Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-fēlīcĭtas, ātis, f. [infelix], ill-luck, misfortune (rare but class.): quid hoc infelicitatis? Ter. Ad. 4, 5, 5: haruspicum, Cic. Div. 2, 29 fin.: gravior, Liv. 40, 55 fin. al.
Plur.: miseriae et infelicitates, calamities, App. Dogm. Plat. 2, p. 17, 37.