Nous

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late 17th century (in nous (sense 2)): from Greek, ‘mind, intelligence, intuitive apprehension’.

wiktionary

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Borrowed from Ancient Greek νοῦς(noûs) or νόος(nóos, “mind”).

etymonline

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nous (n.)

college slang for "intelligence, wit, cleverness, common sense," 1706, from Greek nous, Attic form of noos "mind, intelligence, perception, intellect," which was taken in English in philosophy 1670s as "the perceptive and intelligent faculty." The Greek word is of uncertain origin. Beekes writes, "No doubt an old inherited verbal noun ..., though there is no certain etymology."