to make small or fine: to thresh out, winnow , [variant datesAnthology Palantina:—;Pass. to be reduced, grow lean , (Aristotle Philosopher); τοὺς ὤμους λεπτύνεσθαι (Xenophon Historicus) (ML)
STRONG'S WORD STUDY
G8183 — λεπτύνω
leptunō · to make fine · Greek