word-forming element used chiefly in biology and meaning "within, inside, inner," from Greek ento-, combining form of entos (adv., prep.) "within, inside," as a noun, "inner parts" (cognate with Latin intus), from PIE *entos-, extended form of root *en "in," with adverbial suffix *-tos, denoting origin.
Entries linking to ento-
*en
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."
denizen n.
early 15c., "a citizen, a dweller, an inhabitant," especially "legally established inhabitant of a city or borough, a citizen as distinguished from a non-resident native or a foreigner," from Anglo-French deinzein, denzein, (Old French deinzein) "one within" (the privileges of a city franchise; opposed to forein "one without"), from deinz "within, inside," from Late Latin deintus, from de- "from" + intus "within" (see ento-).
Historically, an alien admitted to certain rights of citizenship in a country; a naturalized citizen (but ineligible to public office). Formerly also an adjective, "within the city franchise, having certain rights and privileges of citizenship" (late 15c.). Compare foreign.