Sentence:  ... he made a Sign to me, that the Salt was not good to eat, and putting a little into his own Mouth, he seem'd to <WSD>nauseate</WSD> it, and would spit and sputter at it, washing his Mouth with fresh Water after it ... 
Meaning of the word marked with <WSD> tags:  To reject or spit (something) out because it causes a feeling of nausea.