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From The Collaborative International Dictionary of English v.0.48:
Nauseate \Nau"se*ate\, v. i. [imp. & p. p. Nauseated; p. pr. & vb. n. Nauseating.] [L. nauseare, nauseatum, fr. nausea. See Nausea.] To become squeamish; to feel nausea; to turn away with disgust. [1913 Webster]