Meaning

noun the act of concealing yourself and lying in wait to attack by surprise

verb wait in hiding to attack

verb hunt (quarry) by stalking and ambushing

originFrom Middle English enbuschen, from Old French enbuscier, anbuchier (verb) (whence Middle French embusche (noun)), from Old French en- + Vulgar Latin boscus (“wood”) (whence also bouquet), from Frankish *busk (“bush”), from Proto-Germanic *buskaz (“bush, heavy stick”). Compare ambuscade. The change to am- from earlier forms in en- is unexplained. More at bush.

Etymology from Wiktionary, CC BY-SA 3.0