adj. 1 mute, speechless, voiceless; silent, quiet, taciturn, mum, wordless; inarticulate She was struck dumb with astonishment 2 dull, stupid, Colloq thick He's too dumb to understand what you are saying
DUMB
Meaning of DUMB in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012