Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rēstĭpŭlātĭo, ōnis, f. [restipulor], a counter-engagement, counter-obligation, Cic. Rosc. Com. 13, 37 sq.; Gai. Inst. 4, 18, p. 259 Goes.