*eue-

late 14c., "shun (someone), refrain from (something), have nothing to do with (an action, a scandal, etc.), escape, evade," from Anglo-French avoider "to clear out, withdraw (oneself)," partially Englished from Old French esvuidier "to empty out," from es- "out" (see ex-) + vuidier "to be empty," from voide "empty, vast, wide, hollow, waste," from Latin vocivos "unoccupied, vacant," related to vacare "be empty" (from PIE *wak-, extended form of root *eue- "to leave, abandon, give out").

In Middle English with a wide range of meanings now obsolete: "to empty, rid, take out, remove, discharge from the body, send away; eject or banish; destroy, erase; depart from or abandon, go away." The current sense corresponds to Old French eviter with which it perhaps was confused. Related: Avoided; avoiding.

"ravage, act of devastating; state of being devastated," mid-15c., from Medieval Latin devastationem (nominative devastatio), noun of action from past-participle stem of Latin devastare "lay waste completely," from de- "completely" (see de-) + vastare "lay waste," from vastus "empty, desolate," from PIE *wasto-, extended suffixed form of root *eue- "to leave, abandon, give out."