- introverted
- 1781, pp. adj. from introvert.
- introvert (v.)
- 1654 (implied in introversion), from L. intro- "inward" + vertere "to turn" (see versus). Introverted (adj.) is from 1781. The noun (opposed to extrovert) is 1918, from Ger. psychology, introduced there by C.G. Jung (1875-1961).
- ambivert
- "person exhibiting features of an extrovert and an introvert," coined by Kimball Young in "Source Book for Social Psychology" (1927), from ambi- "about, around" + L. vertere, as in introvert.
- extrovert
- 1916, extravert (spelled with -o- after 1918, by influence of introvert), from Ger. Extravert, from extra "outside" + L. vertere "to turn"see versus). With introvert, terms used in Eng. by doctors and scientists in various literal senses since 1600s, but popularized in a psychological sense by Carl Jung. Related: Extroverted.