ambivert (n.) Look up ambivert at Dictionary.com
"person exhibiting features of an extrovert and an introvert," coined by Kimball Young in "Source Book for Social Psychology" (1927), from ambi- "about, around" + -vert, as in earlier introvert, ultimately from Latin vertere "to turn," from PIE root *wer- (3) "to turn, bend" (see versus). Related: Ambiversion.