עָצַם ʻâtsam (H6105)

to bind fast, i.e. close (the eyes); intransitively, to be (causatively, make) powerful or numerous; to crunch the bones

1) to be vast, be numerous, be mighty 1a)(Qal) 1a1) to be mighty 1a2) to be numerous 1b) (Hiphil) to make strong, make mighty 2) to shut (the eyes), close (the eyes) 2a) (Qal) to shut (the eyes) 2b) (Piel) to shut tightly (the eyes)

a primitive root; also denominatively (from עֶצֶם (H6106))