Bible Dictionary · D
Dumb
From natural infirmity (Ex 4:11); not knowing what to say (Prov 31:8); unwillingness to speak (Ps 39:9; Lev 10:3). Christ repeatedly restored the dumb (Matt 9:32, Matt 9:33; Luke 11:14; Matt 12:22) to the use of speech.
From Easton’s Bible Dictionary (1897), by Matthew George Easton.