The word "letch" is an informal term that refers to a strong desire or craving for sexual gratification. Its opposite, or antonym, is a sense of sexual disinterest or lack of desire. Some possible antonyms for "letch" include indifference, apathy, frigidity, impotence, or celibacy. These terms describe a lack of sexual attraction or a conscious decision to abstain from sexual activities. While "letch" has negative connotations of objectifying and degrading others for one's own pleasure, its antonyms suggest a more respectful approach to sexuality that values consent, mutual pleasure, and emotional connection.