Old English flean "to skin, to flay" (strong verb, past tense flog, past participle flagen), from Proto-Germanic *flahan (source also of Middle Dutch vlaen, Old High German flahan, Old Norse fla), from PIE root *pl(e)ik-, *pleik- "to tear, rend" (source also of Lithuanian plėšti "to tear"). Related: Flayed; flaying.
It forms all or part of: derm; -derm; derma; dermal; dermato-; dermatology; echinoderm; epidermis; hypodermic; pachyderm; scleroderma; taxidermy; tart (adj.) "having a sharp taste;" tear (v.1) "pull apart;" tetter; turd.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit drnati "cleaves, bursts;" Greek derein "to flay;" Armenian terem "I flay;" Old Church Slavonic dera "to burst asunder;" Breton darn "piece;" Old English teran "to tear, lacerate."
"to flay, strip off the skin of, to break and remove the outer layers of the skin in any manner," early 15c., from Late Latin excoriatus, past participle of excoriare "flay, strip off the hide," from Latin ex "out, out of, off" (see ex-) + corium "hide, skin" (see corium). Figurative sense of "denounce, censure" is recorded in English by 1708. Related: Excoriated; excoriating.
"the skin, the true skin, the derma," 1835, from Greek derma "skin, hide, leather," from PIE root *der- "to split, flay, peel," with derivatives referring to skin and leather.