Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* ŏbīrātĭo, ōnis, f. [obirascor], a becoming or being angry, anger: hujus nebulonis obiratione, Cic. Att. 6, 3, 7 dub.; v. Orell. ad loc. (B. and K., oratione).