Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
oggannĭo (obg-), īvi or ĭi, ītum, 4, v. n. [ob-gannio], to yelp, snarl, or growl at (ante- and post-class.): ogganniunt, Enn. ap. Non. 147, 11: quin centies eadem imperem atque ogganniam, Plaut. As. 2, 4, 16: habet haec se quod, dum vivat, usque ad aurem ogganiat, Ter. Phorm. 5, 9, 41: aliquid in aurem alicujus, App. M. 2, p. 115, 16.