Revert comes from Old French revertir, from Latin revertere ('to turn back, come back'), from re- ('back') + vertere ('to turn'). The historical chain includes Latin revertere, Latin vertere, and Proto-Indo-European *wert-. Older glosses in the chain include "to turn back, come back", "back", and "to turn", which help explain the semantic range of the modern word. Morphologically, revert is best read as compound and borrowing, yielding an English verb shaped by both form history and later usage. In current English it functions as a verb, with the sense "to return to a previous state, condition, or behavior". English derivatives include reverter and revertible; related forms include reversion, reverse, reversal, and convert. The result is an English verb whose etymology preserves the older forms while supporting the word's specialized modern meaning.