Scar
late Middle English: from Old French escharre, via late Latin from Greek eskhara ‘scab’.
wiktionary
From Middle English scar, scarre, a conflation of Old French escare(“scab”) (from Late Latin eschara, from Ancient Greek ἐσχάρα(eskhára, “scab left from a burn”), and thus a doublet of eschar) and Middle English skar(“incision, cut, fissure”) (from Old Norse skarð(“notch, chink, gap”), from Proto-Germanic *skardaz(“gap, cut, fragment”)). Akin to Old Norse skor(“notch, score”), Old English sċeard(“gap, cut, notch”). More at shard.
Displaced native Old English dolgswæþ.
From Middle English scarre, skarr, skerre, sker, a borrowing from Old Norse sker(“an isolated rock in the sea; skerry”). Cognate with Icelandic sker, Norwegian skjær, Swedish skär, Danish skær, German Schäre. Doublet of skerry.
From Latin scarus(“a kind of fish”), from Ancient Greek σκάρος(skáros, “parrot wrasse, Sparisoma cretense, syn. Scarus cretensis”).
etymonline
scar (n.1)
late 14c., from Old French escare "scab" (Modern French escarre), from Late Latin eschara, from Greek eskhara "scab formed after a burn," literally "hearth, fireplace," of unknown origin. English sense probably influenced by Middle English skar (late 14c.) "crack, cut, incision," from Old Norse skarð, related to score (n.). Figurative sense attested from 1580s.
scar (v.)
1550s, from scar (n.1). Figurative use from 1590s. Related: Scarred; scarring.
scar (n.2)
"bare and broken rocky face of a cliff or mountain," 1670s, earlier "rock, crag" (14c.), from Old Norse sker "isolated rock or low reef in the sea," from Proto-Germanic *sker- "to cut" (from PIE root *sker- (1) "to cut") on the notion of "something cut off."
