"knitted or woven covering for the foot, short stocking," early 14c., from Old English socc "slipper, light shoe," from Latin soccus "slipper, light low-heeled shoe," probably a variant of Greek sykchos, word for a kind of shoe, perhaps from Phrygian or another Asiatic language. The Latin word was borrowed generally in West Germanic, e.g. Middle Dutch socke, Dutch sok, Old High German soc, German Socke. To knock the socks off (someone) "beat thoroughly" is recorded from 1845, American English colloquial. Teen slang sock hop is c.1950, from notion of dancing without shoes.
"a blow, a hit with the fist," 1700, from or related to sock (v.1).
1700, "to beat, hit hard, pitch into," of uncertain origin. To sock it to (someone) first recorded 1877.
"to stash (money) away as savings," 1942, American English, from the notion of hiding one's money in a sock (see sock (n.1)).
Plagued by adverse weather, esp by fog, heavy rain or snow, etc: You may find yourself partly socked in if you're coming down the Jersey Turnpike this morning
[1953+; probably fr the adverse weather indications given by the wind sock at early or small airports; perhaps influenced by the notion of being closed up in a sock as money is when it is socked away]
[fr the use of a sock as a container; one reference of 1698 indicates that sock meant ''pocket'' in underworld slang]