What is the origin of revenant?

Revenant “a person who returns as a spirit after death” is a direct borrowing from French, in which the word is a present participle meaning “coming back, returning.” The infinitive, revenir, is a combination of the prefix re- “back, again” and venir “to come,” the latter from Latin venīre, of the same meaning. Venīre is the source of English terms such as adventure, avenue, convenient, eventual, and invention, all of which originally related to movement, gathering, or discovery (i.e., coming across something); the Latin verb derives from the same Proto-Indo-European root, gwā- “to go, come,” that gives us come, become, welcome, and the Ancient Greek-derived terms acrobat and basis (from baínein). Revenant was first recorded in English in the 1820s.