dumbfoundKK [ˋdʌmfaʊnd] /ˈdʌmfaʊnd/發音動詞1使目瞪口呆、使驚愕、令人啞口無言常用被動The sudden apology from her boss dumbfounded everyone in the office.老闆突然道歉,讓辦公室裡的人都目瞪口呆。