Frisk
early 16th century (in frisk (sense 2 of the noun)): from obsolete frisk ‘lively, frisky’, from Old French frisque ‘alert, lively, merry’, perhaps of Germanic origin. frisk (sense 1 of the noun), originally a slang term, dates from the late 18th century.
wiktionary
From Middle English frisk(“lively, frisky”), from Old French frisque(“lively, jolly, blithe, fine, spruce, gay”), of Germanic origin, perhaps from Middle Dutch frisc(“fresh”) or Old High German frisc(“fresh”), ultimately from Proto-Germanic *friskaz(“fresh”). Cognate with Icelandic frískur(“frisky, fresh”). More at fresh.
Alternative etymology derives frisk from an alteration (due to Old French fresche(“fresh”)) of Old French fricque, frique(“smart, strong, playful, bright”), from Gothic *𐍆𐍂𐌹𐌺𐍃( *friks, “greedy, hungry”), from Proto-Germanic *frekaz, *frakaz(“greedy, active”), from Proto-Indo-European *preg-(“greedy, fierce”). Cognate with Middle Dutch vrec(“greedy, avaricious”), German frech(“insolent”), Old English frec(“greedy, eager, bold, daring, dangerous”). More at freak.
etymonline
frisk (v.)
1510s, "to dance, frolic," from Middle English adjective frisk "lively" (mid-15c.), from Old French frisque "lively, brisk," also "fresh, new; merry, animated" (13c.), which is ultimately from a Germanic source (compare Middle Dutch vrisch "fresh," Old High German frisc "lively;" see fresh (adj.1)). Sense of "pat down in a search" first recorded 1781. Related: Frisked; frisking. As a noun, "a frolic, a gambol," from 1520s.
