snow (n.)

Old English snaw "snow, that which falls as snow; a fall of snow; a snowstorm," from Proto-Germanic *snaiwaz (source also of Old Saxon and Old High German sneo, Old Frisian and Middle Low German sne, Middle Dutch snee, Dutch sneeuw, German Schnee, Old Norse snjor, Gothic snaiws "snow"), from PIE root *sniegwh- "snow; to snow" (source also of Greek nipha, Latin nix (genitive nivis), Old Irish snechta, Irish sneachd, Welsh nyf, Lithuanian sniegas, Old Prussian snaygis, Old Church Slavonic snegu, Russian snieg', Slovak sneh "snow"). The cognate in Sanskrit, snihyati, came to mean "he gets wet." As slang for "cocaine" it is attested from 1914.

snow (v.)

c. 1300, from the noun, replacing Old English sniwan, which would have yielded modern snew (which existed as a parallel form until 17c. and, in Yorkshire, even later), from the root of snow (n.). The Old English verb is cognate with Middle Dutch sneuuwen, Dutch sneeuwen, Old Norse snjova, Swedish snöga.

Also þikke as snow þat snew,
Or al so hail þat stormes blew.
[Robert Mannyng of Brunne, transl. Wace's "Chronicle," c. 1330]

The figurative sense of "overwhelm; surround, cover, and imprison" (as deep snows can do to livestock) is 1880, American English, in phrase to snow (someone) under. Snow job "strong, persistent persuasion in a dubious cause" is World War II armed forces slang, probably from the same metaphoric image.

Definitions of snow
snow (n.)
precipitation falling from clouds in the form of ice crystals;
Synonyms: snowfall
snow (n.)
a layer of snowflakes (white crystals of frozen water) covering the ground;
snow (n.)
street names for cocaine;
Synonyms: coke / blow / nose candy / c
snow (v.)
fall as snow;
It was snowing all night
snow (v.)
conceal one's true motives from especially by elaborately feigning good intentions so as to gain an end;
Synonyms: bamboozle / hoodwink / pull the wool over someone's eyes / lead by the nose / play false
Snow (n.)
English writer of novels about moral dilemmas in academe (1905-1980);
Synonyms: C. P. Snow / Charles Percy Snow / Baron Snow of Leicester