The headword is comparative of the adjective nwqh/s (nu 535, and cf. also nu 534, nu 536, nu 537), masculine nominative singular.
Perhaps generated by Plato, Apology 30E (web address 1), which uses the dative singular in the famous "gadfly" comparison: Socrates says that the city of Athens, like a large and noble horse, has grown sluggish because of its size and needs to be roused. [Burnet ad loc. gives reasons for preferring the reading of ms. B, nwqeste/rw|, to that of ms. T, nwqrote/rw|.] Alternatively, note e.g. the masc. nom. sing. itself in (e.g.) (?)Aeschylus, Prometheus Bound 62.