The word "ruttishness" refers to a strong sexual desire that can be considered excessive or even obsessive. While there may not be exact antonyms for this word, there are certainly several words that can be considered the opposite of ruttishness. These words might include chastity, abstinence, modesty, prudence, and restraint. These words all suggest a sense of control, discipline, and a lack of excessive or obsessive sexual desire. While ruttishness may be viewed as a negative or unhealthy quality in certain contexts, the opposite qualities represented by these words can be considered positive and admirable.