Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
interdictĭo, ōnis, f. [interdico], a prohibiting, interdicting: tecti et aquae et ignis interdictione, banishment, Auct. Or. pro Dom. 30: finium, Liv. 41, 24: habes igitur et theatri interdictionem de interdictione impudicitiae, Tert. Spect. 17; cf. id. ib. 3.