Sentence:  In his <WSD>disgustful</WSD> recoil from an overture which tho' he but ill comprehended he instinctively knew must involve evil of some sort, Billy Budd was like a young horse fresh from the pasture suddenly inhaling a vile whiff from some chemical factory, and by repeated snortings tries to get it out of his nostrils and lungs. 
Meaning of the word marked with <WSD> tags:  Full of disgust.