Where does “κουφός” come from?

κουφός (Greek) comes from Ancient Greek κωφός — blunt, dull, obtuse; mute, noiseless; dumb, mute.

κουφός (Greek): deaf

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	κωφός	blunt, dull, obtuse; mute, noiseless; dumb, mute

κουφός — Etymology, Origin & Word History | Etymology Explorer