異口同聲

Simplified: 异口同声

On the HSK 7-9 vocabulary list, at CEFR level C1.

yìkǒutóngshēng ㄧˋ ㄎㄡˇ ㄊㄨㄥˊ ㄕㄥ

    • different mouths, same voice
    • to speak in unison (idiom)

Character by character

Sources