dumb

Meanings

• slow to learn or understand; lacking intellectual acuity; ; ; - Thackeray
  • "dumb officials make some really dumb decisions"
• temporarily incapable of speaking
  • "struck dumb"
• lacking the power of human speech
  • "dumb animals"
• unable to speak because of hereditary deafness

Synonyms

dense, dim, dull, mute, obtuse, silent, slow, speechless