diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 4c26444b35..ec4f181941 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -164,7 +164,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</MkA>
 		</template>
 		<template #word>
-			{{ Array.isArray(muted) ? muted.map(words => Array.isArray(words) ? words.join() : words).slice(0, 3).join(' ') : muted }}
+			{{ Array.isArray(muted) ? muted.join(' ') : muted }}
 		</template>
 	</I18n>
 </div>
@@ -301,19 +301,19 @@ const pleaseLoginContext = computed<OpenOnRemoteOptions>(() => ({
 
 /* Overload FunctionにLintが対応していないのでコメントアウト
 function checkMute(noteToCheck: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null, checkOnly: true): boolean;
-function checkMute(noteToCheck: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null, checkOnly: false): Array<string | string[]> | false | 'sensitiveMute';
+function checkMute(noteToCheck: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null, checkOnly: false): string | string[] | false | 'sensitiveMute';
 */
-function checkMute(noteToCheck: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null, checkOnly = false): Array<string | string[]> | false | 'sensitiveMute' {
+function checkMute(noteToCheck: Misskey.entities.Note, mutedWords: Array<string | string[]> | undefined | null, checkOnly = false): string | string[] | false | 'sensitiveMute' {
 	if (mutedWords == null) return false;
 
 	const result = checkWordMute(noteToCheck, $i, mutedWords);
-	if (Array.isArray(result)) return result;
+	if (typeof result === 'string' || Array.isArray(result)) return result;
 
 	const replyResult = noteToCheck.reply && checkWordMute(noteToCheck.reply, $i, mutedWords);
-	if (Array.isArray(replyResult)) return replyResult;
+	if (typeof replyResult === 'string' || Array.isArray(replyResult)) return replyResult;
 
 	const renoteResult = noteToCheck.renote && checkWordMute(noteToCheck.renote, $i, mutedWords);
-	if (Array.isArray(renoteResult)) return renoteResult;
+	if (typeof renoteResult === 'string' || Array.isArray(renoteResult)) return renoteResult;
 
 	if (checkOnly) return false;
 
diff --git a/packages/frontend/src/scripts/check-word-mute.ts b/packages/frontend/src/scripts/check-word-mute.ts
index 98fea1bced..5f620ba6f1 100644
--- a/packages/frontend/src/scripts/check-word-mute.ts
+++ b/packages/frontend/src/scripts/check-word-mute.ts
@@ -4,7 +4,7 @@
  */
 import * as Misskey from 'misskey-js';
 
-export function checkWordMute(note: Misskey.entities.Note, me: Misskey.entities.UserLite | null | undefined, mutedWords: Array<string | string[]>): Array<string | string[]> | false {
+export function checkWordMute(note: Misskey.entities.Note, me: Misskey.entities.UserLite | null | undefined, mutedWords: Array<string | string[]>): string | string[] | false {
 	// 自分自身
 	if (me && (note.userId === me.id)) return false;
 
@@ -13,7 +13,7 @@ export function checkWordMute(note: Misskey.entities.Note, me: Misskey.entities.
 
 		if (text === '') return false;
 
-		const matched = mutedWords.filter(filter => {
+		const matched = mutedWords.find((filter: string | string[]) => {
 			if (Array.isArray(filter)) {
 				// Clean up
 				const filteredFilter = filter.filter(keyword => keyword !== '');
@@ -36,7 +36,7 @@ export function checkWordMute(note: Misskey.entities.Note, me: Misskey.entities.
 			}
 		});
 
-		if (matched.length > 0) return matched;
+		if (matched != null) return matched;
 	}
 
 	return false;