I. ˈin-trə-ˌvərt transitive verb
Etymology: intro- + -vert (as in divert )
Date: 1669
: to turn inward or in upon itself: as
a. : to concentrate or direct upon oneself
b. : to produce psychological introversion in
II. noun
Date: 1883
1. : something (as the retractile proboscis of some worms) that is or can be drawn in especially by invagination
2. : one whose personality is characterized by introversion ; broadly : a reserved or shy person