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disgust (n.)

1590s, from Middle French desgoust "strong dislike, repugnance," literally "distaste" (16c., Modern French dégoût), from desgouster "have a distaste for," from des- "opposite of" (see dis-) + gouster "taste," from Latin gustare "to taste" (from PIE root *geus- "to taste; to choose").

disgust (v.)

c. 1600, from Middle French desgouster "have a distaste for" (see disgust (n.)). Sense has strengthened over time, and subject and object have been reversed; the older use looks like this: "It is not very palatable, which makes some disgust it" (1660s). The reverse sense of "to excite nausea" is attested from 1640s. Related: Disgusted; disgusting.