Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
in-dīlĭgentĭa, ae, f. [indiligens], carelessness, heedlessness, negligence (class.), Plaut. Pers. 4, 4, 9: litterarum missarum, Cic. Q. Fr. 1, 2, 2, § 7: Aeduorum, Caes. B. G. 7, 17: neglecta indiligentiā praedia, Plin. 14, 4, 5, § 50: veri, i. e. neglect of examining into the truth, Tac. H. 4, 49.