Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pūtesco and pūtisco, pūtŭi, 3, v. inch. n. [puteo], to rot, putrefy, Cato, R. R. 3, 4: quod si minus idoneae tempestates sint consecutae, putescere semina soleant, Varr. R. R. 1, 34, 1; Cic. Fin. 5, 13, 38; id. N. D. 2, 64, 160; id. Tusc. 1, 43, 102: cur Ajax putescit, Hor. S. 2, 3, 194; Cels. 2, 30 (al. putrescit): non aliā (muriā) quam qua Byzantia putuit orca, has become soaked, imbued with, Hor. S. 2, 4, 66.