diff --git a/locales/index.d.ts b/locales/index.d.ts
index 39fbb57799..3ed2706298 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -642,6 +642,7 @@ export interface Locale {
     "smtpSecureInfo": string;
     "testEmail": string;
     "wordMute": string;
+    "hardWordMute": string;
     "regexpError": string;
     "regexpErrorDescription": string;
     "instanceMute": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 3757715c0f..5982e71716 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -639,6 +639,7 @@ smtpSecure: "SMTP 接続に暗黙的なSSL/TLSを使用する"
 smtpSecureInfo: "STARTTLS使用時はオフにします。"
 testEmail: "配信テスト"
 wordMute: "ワードミュート"
+hardWordMute: "ハードワードミュート"
 regexpError: "正規表現エラー"
 regexpErrorDescription: "{tab}ワードミュートの{line}行目の正規表現にエラーが発生しました:"
 instanceMute: "サーバーミュート"
diff --git a/packages/backend/migration/1700383825690-hard-mute.js b/packages/backend/migration/1700383825690-hard-mute.js
new file mode 100644
index 0000000000..afd3247f5c
--- /dev/null
+++ b/packages/backend/migration/1700383825690-hard-mute.js
@@ -0,0 +1,11 @@
+export class HardMute1700383825690 {
+    name = 'HardMute1700383825690'
+
+    async up(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "user_profile" ADD "hardMutedWords" jsonb NOT NULL DEFAULT '[]'`);
+    }
+
+    async down(queryRunner) {
+        await queryRunner.query(`ALTER TABLE "user_profile" DROP COLUMN "hardMutedWords"`);
+    }
+}
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 17e7988176..917f4e06d0 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -473,6 +473,7 @@ export class UserEntityService implements OnModuleInit {
 				hasPendingReceivedFollowRequest: this.getHasPendingReceivedFollowRequest(user.id),
 				unreadNotificationsCount: notificationsInfo?.unreadCount,
 				mutedWords: profile!.mutedWords,
+				hardMutedWords: profile!.hardMutedWords,
 				mutedInstances: profile!.mutedInstances,
 				mutingNotificationTypes: [], // 後方互換性のため
 				notificationRecieveConfig: profile!.notificationRecieveConfig,
diff --git a/packages/backend/src/models/UserProfile.ts b/packages/backend/src/models/UserProfile.ts
index d6d85c5609..8a43b60039 100644
--- a/packages/backend/src/models/UserProfile.ts
+++ b/packages/backend/src/models/UserProfile.ts
@@ -215,7 +215,12 @@ export class MiUserProfile {
 	@Column('jsonb', {
 		default: [],
 	})
-	public mutedWords: string[][];
+	public mutedWords: (string[] | string)[];
+
+	@Column('jsonb', {
+		default: [],
+	})
+	public hardMutedWords: (string[] | string)[];
 
 	@Column('jsonb', {
 		default: [],
diff --git a/packages/backend/src/models/json-schema/user.ts b/packages/backend/src/models/json-schema/user.ts
index b0e18db01a..a2ec203e96 100644
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@@ -530,6 +530,18 @@ export const packedMeDetailedOnlySchema = {
 				},
 			},
 		},
+		hardMutedWords: {
+			type: 'array',
+			nullable: false, optional: false,
+			items: {
+				type: 'array',
+				nullable: false, optional: false,
+				items: {
+					type: 'string',
+					nullable: false, optional: false,
+				},
+			},
+		},
 		mutedInstances: {
 			type: 'array',
 			nullable: true, optional: false,
diff --git a/packages/backend/src/server/api/endpoints/i/update.ts b/packages/backend/src/server/api/endpoints/i/update.ts
index b00aa87bee..8ba29c5658 100644
--- a/packages/backend/src/server/api/endpoints/i/update.ts
+++ b/packages/backend/src/server/api/endpoints/i/update.ts
@@ -123,6 +123,11 @@ export const meta = {
 	},
 } as const;
 
+const muteWords = { type: 'array', items: { oneOf: [
+	{ type: 'array', items: { type: 'string' } },
+	{ type: 'string' }
+] } } as const;
+
 export const paramDef = {
 	type: 'object',
 	properties: {
@@ -171,7 +176,8 @@ export const paramDef = {
 		autoSensitive: { type: 'boolean' },
 		ffVisibility: { type: 'string', enum: ['public', 'followers', 'private'] },
 		pinnedPageId: { type: 'string', format: 'misskey:id', nullable: true },
-		mutedWords: { type: 'array' },
+		mutedWords: muteWords,
+		hardMutedWords: muteWords,
 		mutedInstances: { type: 'array', items: {
 			type: 'string',
 		} },
@@ -234,16 +240,20 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (ps.location !== undefined) profileUpdates.location = ps.location;
 			if (ps.birthday !== undefined) profileUpdates.birthday = ps.birthday;
 			if (ps.ffVisibility !== undefined) profileUpdates.ffVisibility = ps.ffVisibility;
-			if (ps.mutedWords !== undefined) {
+
+			function checkMuteWordCount(mutedWords: (string[] | string)[], limit: number) {
 				// TODO: ちゃんと数える
 				const length = JSON.stringify(ps.mutedWords).length;
-				if (length > (await this.roleService.getUserPolicies(user.id)).wordMuteLimit) {
+				if (length > limit) {
 					throw new ApiError(meta.errors.tooManyMutedWords);
 				}
+			}
 
-				// validate regular expression syntax
-				ps.mutedWords.filter(x => !Array.isArray(x)).forEach(x => {
-					const regexp = x.match(/^\/(.+)\/(.*)$/);
+			function validateMuteWordRegex(mutedWords: (string[] | string)[]) {
+				for (const mutedWord of mutedWords) {
+					if (typeof mutedWord !== "string") continue;
+
+					const regexp = mutedWord.match(/^\/(.+)\/(.*)$/);
 					if (!regexp) throw new ApiError(meta.errors.invalidRegexp);
 
 					try {
@@ -251,11 +261,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					} catch (err) {
 						throw new ApiError(meta.errors.invalidRegexp);
 					}
-				});
+				}
+			}
+
+			if (ps.mutedWords !== undefined) {
+				checkMuteWordCount(ps.mutedWords, (await this.roleService.getUserPolicies(user.id)).wordMuteLimit);
+				validateMuteWordRegex(ps.mutedWords);
 
 				profileUpdates.mutedWords = ps.mutedWords;
 				profileUpdates.enableWordMute = ps.mutedWords.length > 0;
 			}
+			if (ps.hardMutedWords !== undefined) {
+				checkMuteWordCount(ps.hardMutedWords, (await this.roleService.getUserPolicies(user.id)).wordMuteLimit);
+				validateMuteWordRegex(ps.hardMutedWords);
+				profileUpdates.hardMutedWords = ps.hardMutedWords;
+			}
 			if (ps.mutedInstances !== undefined) profileUpdates.mutedInstances = ps.mutedInstances;
 			if (ps.notificationRecieveConfig !== undefined) profileUpdates.notificationRecieveConfig = ps.notificationRecieveConfig;
 			if (typeof ps.isLocked === 'boolean') updates.isLocked = ps.isLocked;
diff --git a/packages/backend/test/e2e/users.ts b/packages/backend/test/e2e/users.ts
index 1867525cc8..2ce8fbc129 100644
--- a/packages/backend/test/e2e/users.ts
+++ b/packages/backend/test/e2e/users.ts
@@ -168,6 +168,7 @@ describe('ユーザー', () => {
 			hasPendingReceivedFollowRequest: user.hasPendingReceivedFollowRequest,
 			unreadAnnouncements: user.unreadAnnouncements,
 			mutedWords: user.mutedWords,
+			hardMutedWords: user.hardMutedWords,
 			mutedInstances: user.mutedInstances,
 			mutingNotificationTypes: user.mutingNotificationTypes,
 			notificationRecieveConfig: user.notificationRecieveConfig,
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index e300ef88a5..6349df2e30 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div
-	v-if="!muted"
+	v-if="!hardMuted && !muted"
 	v-show="!isDeleted"
 	ref="el"
 	v-hotkey="keymap"
@@ -133,7 +133,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</div>
 	</article>
 </div>
-<div v-else :class="$style.muted" @click="muted = false">
+<div v-else-if="!hardMuted" :class="$style.muted" @click="muted = false">
 	<I18n :src="i18n.ts.userSaysSomething" tag="small">
 		<template #name>
 			<MkA v-user-preview="appearNote.userId" :to="userPage(appearNote.user)">
@@ -183,6 +183,7 @@ const props = withDefaults(defineProps<{
 	note: Misskey.entities.Note;
 	pinned?: boolean;
 	mock?: boolean;
+	withHardMute?: boolean;
 }>(), {
 	mock: false,
 });
@@ -239,13 +240,23 @@ const urls = $computed(() => parsed ? extractUrlFromMfm(parsed) : null);
 const isLong = shouldCollapsed(appearNote, urls ?? []);
 const collapsed = ref(appearNote.cw == null && isLong);
 const isDeleted = ref(false);
-const muted = ref($i ? checkWordMute(appearNote, $i, $i.mutedWords) : false);
+const muted = ref(checkMute(appearNote, $i?.mutedWords));
+const hardMuted = ref(props.withHardMute && checkMute(appearNote, $i?.hardMutedWords));
 const translation = ref<any>(null);
 const translating = ref(false);
 const showTicker = (defaultStore.state.instanceTicker === 'always') || (defaultStore.state.instanceTicker === 'remote' && appearNote.user.instance);
 const canRenote = computed(() => ['public', 'home'].includes(appearNote.visibility) || (appearNote.visibility === 'followers' && appearNote.userId === $i.id));
 let renoteCollapsed = $ref(defaultStore.state.collapseRenotes && isRenote && (($i && ($i.id === note.userId || $i.id === appearNote.userId)) || (appearNote.myReaction != null)));
 
+function checkMute(note: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null): boolean {
+	if (mutedWords == null) return false;
+
+	if (checkWordMute(note, $i, mutedWords)) return true;
+	if (note.reply && checkWordMute(note.reply, $i, mutedWords)) return true;
+	if (note.renote && checkWordMute(note.renote, $i, mutedWords)) return true;
+	return false;
+}
+
 const keymap = {
 	'r': () => reply(true),
 	'e|a|plus': () => react(true),
diff --git a/packages/frontend/src/components/MkNotes.vue b/packages/frontend/src/components/MkNotes.vue
index 89fd504dcc..7af31074db 100644
--- a/packages/frontend/src/components/MkNotes.vue
+++ b/packages/frontend/src/components/MkNotes.vue
@@ -24,7 +24,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				:ad="true"
 				:class="$style.notes"
 			>
-				<MkNote :key="note._featuredId_ || note._prId_ || note.id" :class="$style.note" :note="note"/>
+				<MkNote :key="note._featuredId_ || note._prId_ || note.id" :class="$style.note" :note="note" :withHardMute="true"/>
 			</MkDateSeparatedList>
 		</div>
 	</template>
diff --git a/packages/frontend/src/components/MkNotifications.vue b/packages/frontend/src/components/MkNotifications.vue
index 0c817bd64c..7b072fa492 100644
--- a/packages/frontend/src/components/MkNotifications.vue
+++ b/packages/frontend/src/components/MkNotifications.vue
@@ -15,7 +15,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 		<template #default="{ items: notifications }">
 			<MkDateSeparatedList v-slot="{ item: notification }" :class="$style.list" :items="notifications" :noGap="true">
-				<MkNote v-if="['reply', 'quote', 'mention'].includes(notification.type)" :key="notification.id" :note="notification.note"/>
+				<MkNote v-if="['reply', 'quote', 'mention'].includes(notification.type)" :key="notification.id" :note="notification.note" :withHardMute="true"/>
 				<XNotification v-else :key="notification.id" :notification="notification" :withTime="true" :full="true" class="_panel"/>
 			</MkDateSeparatedList>
 		</template>
diff --git a/packages/frontend/src/pages/settings/mute-block.vue b/packages/frontend/src/pages/settings/mute-block.vue
index c6cbd424ec..4883ca0df4 100644
--- a/packages/frontend/src/pages/settings/mute-block.vue
+++ b/packages/frontend/src/pages/settings/mute-block.vue
@@ -9,7 +9,14 @@ SPDX-License-Identifier: AGPL-3.0-only
 		<template #icon><i class="ti ti-message-off"></i></template>
 		<template #label>{{ i18n.ts.wordMute }}</template>
 
-		<XWordMute/>
+		<XWordMute :muted="$i!.mutedWords" @save="saveMutedWords"/>
+	</MkFolder>
+
+	<MkFolder>
+		<template #icon><i class="ti ti-message-off"></i></template>
+		<template #label>{{ i18n.ts.hardWordMute }}</template>
+
+		<XWordMute :muted="$i!.hardMutedWords" @save="saveHardMutedWords"/>
 	</MkFolder>
 
 	<MkFolder>
@@ -129,6 +136,7 @@ import { definePageMetadata } from '@/scripts/page-metadata.js';
 import MkUserCardMini from '@/components/MkUserCardMini.vue';
 import * as os from '@/os.js';
 import { infoImageUrl } from '@/instance.js';
+import { $i } from '@/account.js';
 import MkFolder from '@/components/MkFolder.vue';
 
 const renoteMutingPagination = {
@@ -207,6 +215,14 @@ async function toggleBlockItem(item) {
 	}
 }
 
+async function saveMutedWords(mutedWords: (string | string[])[]) {
+	await os.api('i/update', { mutedWords });
+}
+
+async function saveHardMutedWords(hardMutedWords: (string | string[])[]) {
+	await os.api('i/update', { hardMutedWords });
+}
+
 const headerActions = $computed(() => []);
 
 const headerTabs = $computed(() => []);
diff --git a/packages/frontend/src/pages/settings/mute-block.word-mute.vue b/packages/frontend/src/pages/settings/mute-block.word-mute.vue
index 25a836ea55..7328967c51 100644
--- a/packages/frontend/src/pages/settings/mute-block.word-mute.vue
+++ b/packages/frontend/src/pages/settings/mute-block.word-mute.vue
@@ -18,16 +18,17 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { ref, watch } from 'vue';
 import MkTextarea from '@/components/MkTextarea.vue';
-import MkKeyValue from '@/components/MkKeyValue.vue';
 import MkButton from '@/components/MkButton.vue';
-import MkInfo from '@/components/MkInfo.vue';
-import MkTab from '@/components/MkTab.vue';
 import * as os from '@/os.js';
-import number from '@/filters/number.js';
-import { defaultStore } from '@/store.js';
-import { $i } from '@/account.js';
 import { i18n } from '@/i18n.js';
-import { definePageMetadata } from '@/scripts/page-metadata.js';
+
+const props = defineProps<{
+	muted: (string[] | string)[];
+}>();
+
+const emit = defineEmits<{
+	(ev: 'save', value: (string[] | string)[]): void;
+}>();
 
 const render = (mutedWords) => mutedWords.map(x => {
 	if (Array.isArray(x)) {
@@ -37,8 +38,7 @@ const render = (mutedWords) => mutedWords.map(x => {
 	}
 }).join('\n');
 
-const tab = ref('soft');
-const mutedWords = ref(render($i!.mutedWords));
+const mutedWords = ref(render(props.muted));
 const changed = ref(false);
 
 watch(mutedWords, () => {
@@ -85,9 +85,7 @@ async function save() {
 		return;
 	}
 
-	await os.api('i/update', {
-		mutedWords: parsed,
-	});
+	emit('save', parsed);
 
 	changed.value = false;
 }
diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index 63c3cb71a5..dc93c4be3b 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -1565,7 +1565,8 @@ export type Endpoints = {
             injectFeaturedNote?: boolean;
             receiveAnnouncementEmail?: boolean;
             alwaysMarkNsfw?: boolean;
-            mutedWords?: string[][];
+            mutedWords?: (string[] | string)[];
+            hardMutedWords?: (string[] | string)[];
             notificationRecieveConfig?: any;
             emailNotificationTypes?: string[];
             alsoKnownAs?: string[];
@@ -2516,7 +2517,8 @@ type MeDetailed = UserDetailed & {
     integrations: Record<string, any>;
     isDeleted: boolean;
     isExplorable: boolean;
-    mutedWords: string[][];
+    mutedWords: (string[] | string)[];
+    hardMutedWords: (string[] | string)[];
     notificationRecieveConfig: {
         [notificationType in typeof notificationTypes_2[number]]?: {
             type: 'all';
@@ -3053,9 +3055,9 @@ type UserSorting = '+follower' | '-follower' | '+createdAt' | '-createdAt' | '+u
 //
 // src/api.types.ts:16:32 - (ae-forgotten-export) The symbol "TODO" needs to be exported by the entry point index.d.ts
 // src/api.types.ts:20:25 - (ae-forgotten-export) The symbol "NoParams" needs to be exported by the entry point index.d.ts
-// src/api.types.ts:634:18 - (ae-forgotten-export) The symbol "ShowUserReq" needs to be exported by the entry point index.d.ts
-// src/entities.ts:116:2 - (ae-forgotten-export) The symbol "notificationTypes_2" needs to be exported by the entry point index.d.ts
-// src/entities.ts:627:2 - (ae-forgotten-export) The symbol "ModerationLogPayloads" needs to be exported by the entry point index.d.ts
+// src/api.types.ts:635:18 - (ae-forgotten-export) The symbol "ShowUserReq" needs to be exported by the entry point index.d.ts
+// src/entities.ts:117:2 - (ae-forgotten-export) The symbol "notificationTypes_2" needs to be exported by the entry point index.d.ts
+// src/entities.ts:628:2 - (ae-forgotten-export) The symbol "ModerationLogPayloads" needs to be exported by the entry point index.d.ts
 // src/streaming.types.ts:33:4 - (ae-forgotten-export) The symbol "FIXME" needs to be exported by the entry point index.d.ts
 
 // (No @packageDocumentation comment for this package)
diff --git a/packages/misskey-js/src/api.types.ts b/packages/misskey-js/src/api.types.ts
index 1a75b7cf57..ba333231e5 100644
--- a/packages/misskey-js/src/api.types.ts
+++ b/packages/misskey-js/src/api.types.ts
@@ -432,7 +432,8 @@ export type Endpoints = {
 		injectFeaturedNote?: boolean;
 		receiveAnnouncementEmail?: boolean;
 		alwaysMarkNsfw?: boolean;
-		mutedWords?: string[][];
+		mutedWords?: (string[] | string)[];
+		hardMutedWords?: (string[] | string)[];
 		notificationRecieveConfig?: any;
 		emailNotificationTypes?: string[];
 		alsoKnownAs?: string[];
diff --git a/packages/misskey-js/src/entities.ts b/packages/misskey-js/src/entities.ts
index a51315b13b..2ddcf93f5d 100644
--- a/packages/misskey-js/src/entities.ts
+++ b/packages/misskey-js/src/entities.ts
@@ -112,7 +112,8 @@ export type MeDetailed = UserDetailed & {
 	integrations: Record<string, any>;
 	isDeleted: boolean;
 	isExplorable: boolean;
-	mutedWords: string[][];
+	mutedWords: (string[] | string)[];
+	hardMutedWords: (string[] | string)[];
 	notificationRecieveConfig: {
 		[notificationType in typeof notificationTypes[number]]?: {
 			type: 'all';