Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
assentātĭuncŭla (ads-), ae, f. dim. [assentatio], petty, trivial flattery: adsentatiunculae ac perjuratiunculae parasiticae, * Plaut. Stich. 1, 3, 75: non vereor, ne adsentatiunculā quādam aucupari tuam gratiam videar, * Cic. Fam. 5, 12.