Synonyms of the word 
INTROVERTIVE → INTROVERTISH - SHUT-IN - UNSOCIABLE
introvertive
- adj. Of, or pertaining to being an introvert.
introvertish
- adj. introverted.
shut-in
- adj. Confined to a location, as by infirmity or illness.
- adj. Introverted.
- n. A person confined to a location, as by illness or infirmity.
unsociable
- adj. not needing the company of others.
- adj. not congenial or compatible.
- adj. unfriendly.
If you are interested in words, visit the following sites :
- wiktionary.org/introvertive For complete definition of a word
- 1word.ws/introvertive to play with words, suffixs, prefixs, etc.