1650s, "action of turning inward" (of thought or contemplation), from Modern Latin introversionem, noun of action from past participle stem of *introvertere (see introvert (v.)). Psychological meaning "tendency to withdraw from the world" is from 1912.
late 14c., "withdraw (oneself), go away, stay away," from Old French absenter "absent (oneself)," from Late Latin absentare "cause to be away," from Latin absentem (see absent (adj.)). Related: Absented; absenting.
1520s, "to draw back," of persons, from obsolete French resiler "withdraw from an agreement," or directly from Latin resilire "to jump back" (see resilience). The meaning "spring back, start back, recoil" (of material things, especially elastic bodies) is from 1708. Related: Resiled; resiling.