late 14c., from O.Fr. experience, from L. experientia "knowledge gained by repeated trials," from experientem (nom. experiens), prp. of experiri "to try, test," from ex- "out of" + peritus "experienced, tested." The v. (1530s) first meant "to test, try;" sense of "feel, undergo" first recorded 1580s. Related: Experienced; experiences; experiencing.