The word νóoς (νoύς) must, if it is inherited from Indo-European, be a word of the λóγoς type, and come from Indo-Eur. nósos, nówos, or nóyos, since a consonant must have been lost, and it is known that only s, w, and y vanished between vowels in Greek. Neither nóyos nor nówos can be traced with a suitable meaning in any Indo-European language; nóyos, on the other hand, would be a very probable ancestor of Skr. nayas. The senses of nayas are, I submit, sufficiently close to those of νóoς to lend some support to the identification. They are: ‘leading, performance, behaviour, worldly wisdom, policy, fundamental principle, system, theory.’