Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rĕpŭdĭātĭo, ōnis, f. [repudio], a rejection, refusal, disdaining (rare, but good prose): supplicum, Cic. Mur. 4, 9: fideicommissi, Cod. Just. 6, 42, 26.
Absol.: mihi simulatio pro repudiatione fuerit, Cic. Att. 12, 51, 2.