ambush v.

Proto-Indo-European root meaning "in."

It forms all or part of: and; atoll; dysentery; embargo; embarrass; embryo; empire; employ; en- (1) "in; into;" en- (2) "near, at, in, on, within;" enclave; endo-; enema; engine; enoptomancy; enter; enteric; enteritis; entero-; entice; ento-; entrails; envoy; envy; episode; esoteric; imbroglio; immolate; immure; impede; impend; impetus; important; impostor; impresario; impromptu; in; in- (2) "into, in, on, upon;" inchoate; incite; increase; inculcate; incumbent; industry; indigence; inflict; ingenuous; ingest; inly; inmost; inn; innate; inner; innuendo; inoculate; insignia; instant; intaglio; inter-; interim; interior; intern; internal; intestine; intimate (adj.) "closely acquainted, very familiar;" intra-; intricate; intrinsic; intro-; introduce; introduction; introit; introspect; invert; mesentery.

It is the hypothetical source of/evidence for its existence is provided by: Sanskrit antara- "interior;" Greek en "in," eis "into," endon "within;" Latin in "in, into," intro "inward," intra "inside, within;" Old Irish in, Welsh yn, Old Church Slavonic on-, Old English in "in, into," inne "within, inside."

"many-stemmed woody plant," from Old English bysc (found in place names), from West Germanic *busk "bush, thicket" (source also of Old Saxon and Old High German busc, Dutch bosch, bos, German Busch). Influenced by or combined with Old French (busche "firewood") and Medieval Latin busca (source also of Italian bosco, Spanish bosque, French bois), both of which probably are from Germanic (compare Boise).

In the British American colonies, applied from 1650s to the uncleared districts. In South Africa, "country," as opposed to town (1780); probably from Dutch bosch in the same sense. As "branch of a tree hung out as a tavern-sign," 1530s; hence the proverb "good wine needs no bush." The meaning "pubic hair" (especially of a woman) is from 1745.

To beat the bushes (mid-15c.) is a way to rouse birds so that they fly into the net which others are holding, which originally was the same thing as beating around the bush (see beat (v.)).

1580s, "act of lying concealed for the purpose of attacking by surprise," essentially a variant form of ambush (q.v.), "now more formal as a military term" [OED]. It is a reborrowing of that French word after it had been Italianized: Ambuscade is from French embuscade (16c.), Gallicized from Italian imboscata, literally "a hiding in the bush," compounded from the same elements as Old French embuscher.

Sometimes in early use in English it appears as ambuscado, with a faux Spanish ending of the sort popular in 17c. As a verb, "attack from a concealed position," by 1590s. Related: Ambuscaded; ambuscading.