Meaning

verb kill intentionally and with premeditation

adjective not in operation or operational

adjective below a satisfactory level

originEtymology tree Proto-Indo-European *h₂ep Proto-Indo-European *-o Proto-Indo-European *h₂epó Proto-Germanic *ab Proto-West Germanic *ab Old English æf Old English of Middle English of English off From Middle English of, from Old English of, af, æf (“from, off, away”), from Proto-West Germanic *ab, from Proto-Germanic *ab (“from”), from Proto-Indo-European *h₂epo (“from, off, back”). Doublet of of.…

Etymology from Wiktionary, CC BY-SA 3.0