- introspect (v.)
- 1680s, from Latin introspectus, past participle of introspicere "look at, look into" (see introspection). Related: Introspected; introspecting.
- introspection (n.)
- 1670s, noun of action from past participle stem of Latin introspicere "to look into, look at," from intro- "inward" (see intro-) + specere "to look at" (see scope (n.1)).
- introspective (adj.)
- 1820, from Latin introspect-, past participle stem of introspicere (see introspection) + -ive.