Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ēsŭrītĭo, ōnis, f. [1. esurio], a hungering, hunger (rare; not in Cic.), Cat. 23, 14; Gell. 16, 3, 3 sq.; Mart. 1, 100.
In plur, Cat. 21, 1.