diacritic
US /ˌdaɪ.əˈkrɪt̬.ɪk/
UK /ˌdaɪ.əˈkrɪt̬.ɪk/

1.
變音符號, 音標
a mark, sign, or symbol added to a letter or character to indicate a specific phonetic value, stress, tone, or other linguistic feature
:
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The acute accent is a common diacritic in French.
尖音符是法語中常見的變音符號。
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Many languages use diacritics to distinguish between words with similar spellings.
許多語言使用變音符號來區分拼寫相似的單詞。