Where does “desilenciar” come from?

desilenciar (Galician) comes from Catalan silenciar, from Galician -ar, from Galician ar, from Old Portuguese aar, from Old Portuguese aere, from Latin āēr, from Ancient Greek ἀήρ, from Ancient Greek auhḗr.

desilenciar (Galician): to unmute to restore the sound output (on a speaker or other audio device), having previously muted it