1590s, "repugnance excited by something offensive or loathsome," from 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"). The literal sense, "distaste, aversion to the taste of," is from 1610s in English.
c. 1600, "have a strong distaste for or repugnance to," from French desgouster "have a distaste for" (16c.), from desgoust "distaste," also "strong dislike" (see disgust (n.)).
The sense has strengthened over time in English, 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 and loathing in" is attested from 1640s. Related: Disgusted; disgusting.
"causing disgust, offensive to the taste physically, morally, or aesthetically," 1754, present-participle adjective from disgust (v.). Related: Disgustingly. Disgustful "causing disgust" (1610s) was "Very common in 17-18th c." [OED].
1540s (implied in disliking), "be displeased with, regard with some aversion or displeasure," a hybrid which ousted native mislike as the opposite of like (v.). In common with disgust, it sometimes reversed the direction of its action and meant (in this case) "annoy, vex, displease" (1570s), but this sense is archaic or obsolete. Related: Disliked; disliking. The noun sense of "feeling of being displeased" is from 1590s. English in 16c. also had dislove "hate, cease to love," but it did not survive.
It forms all or part of: Angus; choice; choose; degustation; disgust; Fergus; gustation; gustatory; gusto; ragout; Valkyrie.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit jus- "enjoy, be pleased;" Avestan zaosa- "pleasure," Old Persian dauš- "enjoy;" Greek geuesthai "to taste;" Latin gustare "to taste, take a little of;" Old English cosan, cesan, Gothic kausjan "to test, to taste of," Old High German koston "try," German kosten "taste of."
vocalic gesture originally expressing weariness, disgust, etc., attested from c. 1600.
1765, imitative of the sound of a cough; as an interjection of disgust, recorded from 1822. Form ough is from 1560s.