Using these four letters only, create a seven–letter word. - CILT

Question

Beginning with the word "in," add one letter from the given pool to create a new word until you get a seven-letter word meaning "being in a state of suppressed agitation, worry, or resentment."

Pool: T G E S W

1) IN
2)
3)
4)
5)
6)

Answer 1

Considering using the mentioned letters more than once.

The seven letter word that can be made is illicit