*en
原始印欧语根词,意为“在”。
它构成或部分构成以下单词: and; atoll; dysentery; embargo; embarrass; embryo; empire; employ; en-(1)“在; 进入; ” en-(2)“靠近,在,上,在...之内; ” 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)“进入,在,上,在...之内; ” 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(形容词)“亲密的,非常熟悉的; ” intra-; intricate; intrinsic; intro-; introduce; introduction; introit; introspect; invert; mesentery。
它是假设的源头,其存在的证据由以下单词提供:梵语 antara- “内部; ”希腊语 en “在,上,在...之内; ” eis “进入; ” endon “在...之内; ”拉丁语 in “在,进入; ” intro “向内; ” intra “内部,内部的; ”古爱尔兰语 in,威尔士语 yn,古斯拉夫语 on-,古英语 in “在,进入; ” inne “在...之内,内部的。”