Depending on the sense, from two distinct but closely related Latin terms:
- From exit (“he, she, or it goes out, departs, or exits”), the third-person singular present active indicative form of exeō (“I go out, depart, exit”); or,
- From exitus (“a going out, departure”).
ex- (“out of, from”) + eō (“go”)
From Proto-Italic *eō, from Proto-Indo-European *h₁ey-. Cognate with Ancient Greek εἶμι (eîmi, “I go”), Sanskrit एति (éti, “goes”), Hittite 𒄿𒄿𒀀𒋫𒋫 (iyatta, “goes”), Luwian 𒄿𒄿 (iti, “goes”), Old Persian 𐎠𐎡𐎫𐎡𐎹 (aitiy, “goes”), Old Church Slavonic ити (iti).