Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
oppecto (obp-), ĕre, v. a. [ob-pecto], to comb off; transf., of eating, to pluck or pick off, to pick, to eat: nimio melius oppectuntur frigida, Plaut. Pers. 1, 3, 31.