Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
parvĭtas, ātis, f. [parvus], smallness, littleness, slightness, insignificance (rare but class.): vincula talia quae cerni non possent propter parvitatem, * Cic. Univ. 13, 41; Plin. 2, 11, 8, § 51: parvitates et magnitudines rerum, Gell. 1, 3, 28: quaestionis, id. 7, 17, 2: mea parvitas ad favorem tuum decurrit, i. e. my humble self, Val. Max. praef.