Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ēgestĭo, ōnis, f. [egero], a carrying out or off, an emptying, voiding (post-Aug. and rare): cadaverum et ruderum, Suet. Ner. 38: ventris et urinae, Cael. Aur. Tard. 5, 10; for which simply egestio, Suet. Claud. 44 fin.; Veg. Vet. 5, 14, 6: publicarum opum, a wasting, squandering, Plin. Ep. 8, 6, 7.