1) to rub, to rub to pieces
Part of Speech: verb
Prolongation from the same base as G5567; to triturate, that is, (by analogy) to rub out (kernels from husks with the fingers or hand): - rub.
Perseus Digital Library
University of Chicago's Logion lexicon
Thayer's dictionary plus other information.
From this site's dictionary (in Italian)
Click on the first column to search for that word as a form of the root ψώχω; click on the second column to search for that grammatical form of the root ψώχω; click on the third column to search for that word and grammatical form; click on the total to search for the root ψώχω.