https://www.merriam-webster.com/dictionary/dumb
dumb: [adjective] lacking the human power of speech. lacking the ability to speak.

https://www.merriam-webster.com/thesaurus/dumb
Synonyms for DUMB: silent, speechless, mute, mum, inarticulate, muted, wordless, uncommunicative; Antonyms of DUMB: speaking, communicative, talking, eloquent

https://www.vocabulary.com/dictionary/dumb
Today, most of the time someone or something is described as dumb when it shows a lack of thought, like your dumb idea of wearing flip-flops in a snowstorm.

https://www.dictionary.com/browse/dumb
Dumb definition: lacking intelligence or good judgment; stupid; dull-witted. . See examples of DUMB used in a sentence.

https://dictionary.cambridge.org/us/dictionary/english/dumb
DUMB meaning: 1. unable to speak: 2. temporarily unable to speak, for example because you are very surprised or…. Learn more.

https://www.collinsdictionary.com/us/dictionary/english/dumb
SYNONYMS 2, 3. dumb, mute, speechless, voiceless describe a condition in which speech is absent. dumb was formerly used to refer to persons unable to speak; it is now used almost entirely of the inability of animals to speak: dumb beasts of the field. The term mute is applied to persons who, usually because of congenital deafness, have never learned to talk: With training most mute people

https://dictionary.cambridge.org/us/dictionary/learner-english/dumb
DUMB meaning: 1. stupid: 2. physically unable to talk. Learn more.

https://www.oxfordlearnersdictionaries.com/us/definition/english/dumb_1
Definition of dumb adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

https://www.britannica.com/dictionary/dumb
Britannica Dictionary definition of DUMB. 1. informal. a : not showing or having good judgment or intelligence : stupid or foolish. I'm not dumb enough to believe that. It was a dumb idea in the first place. He just stood there with a dumb grin on his face. This is one of the dumbest TV shows I've ever seen.

https://en.wiktionary.org/wiki/dumb
Verb. dumb (third-person singular simple present dumbs, present participle dumbing, simple past and past participle dumbed) ( transitive, dated) To silence . ( transitive) To make stupid . ( transitive) To represent as stupid. ( transitive) To reduce the intellectual demands of.

https://www.wordreference.com/definition/dumb
dumb - WordReference English dictionary, questions, discussion and forums. All Free.

https://www.collinsdictionary.com/us/dictionary/english-thesaurus/dumb
Synonyms of 'dumb' in British English. dumb. 1 (adjective) in the sense of silent. Definition. done or performed without speech. We were all struck dumb for a minute. Synonyms. silent. They both fell silent. mute. I threw her a mute look of appeal. speechless. Alex was speechless with rage and despair.

https://www.collinsdictionary.com/dictionary/english/dumb
9 meanings: 1. lacking the power of human speech 2. offensive lacking the power to speak, either because of defects in the.... Click for more definitions.

https://www.merriam-webster.com/thesaurus/stupid
Synonyms for STUPID: dumb, slow, simple, thick, idiotic, foolish, dull, ignorant; Antonyms of STUPID: brilliant, smart, clever, intelligent, quick, bright, apt, fast

https://www.collinsdictionary.com/dictionary/english-thesaurus/dumb
Synonyms for DUMB in English: silent, mute, speechless, inarticulate, tongue-tied, wordless, voiceless, soundless, at a loss for words, mum,

https://dictionary.cambridge.org/thesaurus/dumb
DUMB - Synonyms, related words and examples | Cambridge English Thesaurus

https://www.merriam-webster.com/dictionary/stupid
stupid: [adjective] slow of mind : obtuse. given to unintelligent decisions or acts : acting in an unintelligent or careless manner. lacking intelligence or reason : brutish.

https://www.oed.com/dictionary/dumb_adj
There are 28 meanings listed in OED's entry for the word dumb, one of which is labelled obsolete, and four of which are considered offensive and derogatory. See 'Meaning & use' for definitions, usage, and quotation evidence. dumb has developed meanings and uses in subjects including. pathology (Old English) wine (1820s) medicine (1870s

https://dictionary.cambridge.org/dictionary/learner-english/dumb
DUMB definition: 1. stupid: 2. physically unable to talk. Learn more.

https://dictionary.cambridge.org/us/dictionary/essential-british-english/dumb
DUMB meaning: 1. stupid or silly: 2. not able to talk. Learn more.

https://www.etymonline.com/word/dumb
dumb (v.) late Old English, adumbian, "to become mute, be silent, keep still," from dumb (adj.). From c. 1600 as "to make mute." Related: Dumbed; dumbing. To dumb (something) down "make less intellectually challenging, make simpler to understand" is by 1933. I can cheer for the Hollywood gag men in conference on a comedy which has been revealed

https://dictionary.cambridge.org/zhs/%E8%AF%8D%E5%85%B8/%E8%8B%B1%E8%AF%AD-%E6%B1%89%E8%AF%AD-%E7%AE%80%E4%BD%93/dumb
dumb翻译：沉默的, 哑的;说不出话的, 愚蠢的, 愚蠢的。了解更多。