Source : Webster's Revised Unabridged Dictionary (1913)

Introspect \In`tro*spect"\, v. t. [L. introspectus, p. p.
   introspicere to look into; intro within + specere to look.
   See {Spy}.]
   To look into or within; to view the inside of. --Bailey.

Source : WordNet®

introspect
     v : reflect on one's own thoughts and feelings