Beginning with word "in," add one letter from the given pool to create a new word until you get a seven-letter word

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

1) IN
2 ) WIN
3) WING
4) SWING
5) SEWING
6) STEWING

The 7 letter word is "STEWING"