dumb /dʌm/
1. slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"
synset: dense, dim, dull, dumb, obtuse, slow
2. temporarily incapable of speaking; "struck dumb"; "speechless with shock"
synset: speechless, dumb
3. lacking the power of human speech; "dumb animals"
synset: dumb
4. unable to speak because of hereditary deafness
Princeton University "About WordNet." WordNet. Princeton University. 2010.
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