Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* rĕnūtus, ūs, m. [renuo], a denying, refusal; a word formed by Pliny the Younger, for the Homeric ἀνένευσεν (Il. 16, 250): ego quoque simili nutu ac renutu respondere voto tuo possum, Plin. Ep. 1, 7, 2.