in modern psychology, 1915, a variant of extroverted (see extrovert). Related: Extravert (n.), for which also see extrovert. There was a verb extravert in mid- to late 17c. meaning "to turn outward so as to be visible," from Latin extra "outward" + vertere "to turn."
extravagance
extravagant
extravaganza
extravasation
extraversion
extraverted
extreme
extremely
extremeness
extremism
extremist