Nauseate, v. t.
1. To affect with nausea; to sicken; to cause to feel loathing or disgust.
2. To sicken at; to reject with disgust; to loathe. The patient nauseates and loathes wholesome foods. Blackmore.
1 other Webster entry under this spelling
Nauseate, v. i. [imp. & p. p. Nauseated; p. pr. & vb. n. Nauseating.]
To become squeamish; to feel nausea; to turn away with disgust.
Shades of meaning
Fernald has no entry of its own for nauseate; he lists it under abhor.
He lists it without comment; the entries above explain its neighbors.