c.1200, from O.N.
skaða "to hurt, injure," from P.Gmc.
*skath- (cf. O.E.
sceaþian "to hurt, injure," O.Fris.
skethia, M.Du.
scaden, Du.
schaden, O.H.G.
scadon, Ger.
schaden, Goth.
scaþjan "to injure, damage"), from PIE base
*sket- "to injure." Only cognate outside Gmc. seems to be in Gk.
a-skethes "unharmed, unscathed." Survives mostly in its negative form,
unscathed, and in figurative meaning "sear with invective or satire" (1852, usually as
scathing) which developed from the sense of "scar, scorch" used by Milton in "Paradise Lost" i.613 (1667).