simple past tense and past participle of dumb

(dated) Unable to speak; lacking power of speech (kept in "deaf, dumb, and blind"). / (dated) Silent; unaccompanied by words. / (informal, derogatory, especially of a person) Extremely stupid.

(dated) To silence. / (transitive) To make stupid. / (transitive) To represent as stupid. / (transitive) To reduce the intellectual demands of.

(dated) The state of being mute: that is, of not communicating vocally, whether from selective mutism (refusal to speak) or from an inability to speak.

present participle of dumb

Third-person singular simple present indicative form of dumb

plural of dumbness

simple past tense and past participle of dumb down

Made condescendingly simple.

simple past tense and past participle of dumb out