Disrelish (; see Dis-), n.
1. Want of relish; dislike (of the palate or of the mind); distaste; a slight degree of disgust; as, a disrelish for some kinds of food. Men love to hear of their power, but have an extreme disrelish to be told of their duty. Burke.
2. Absence of relishing or palatable quality; bad taste; nauseousness. Milton.
1 other Webster entry under this spelling
Disrelish, v. t. [imp. & p. p. Disrelished; p. pr. & vb. n. Disrelishing.]
1. Not to relish; to regard as unpalatable or offensive; to feel a degree of disgust at. Pope.
2. To deprive of relish; to make nauseous or disgusting in a slight degree. Milton.
Shades of meaning
Fernald lists disrelish only as an antonym, under appetite.
He lists it without comment; the entries above explain its neighbors.