κωφός

Etymology
Probably from the same root of.

Adjective

 * 1) blunt, dull, obtuse
 * 2)  mute, noiseless
 * 3)  dumb, mute
 * 4) deaf, deaf-mute
 * 5)  dull, obtuse
 * 6)  senseless, unmeaning, obscure
 * 1)  dull, obtuse
 * 2)  senseless, unmeaning, obscure