Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
topper, adv. [contr. from toto opere], with all diligence, speedily, forthwith (anteclass.; cf.: ab ultimis et jam oblitteratis repetita temporibus, qualia sunt topper et antigerio, etc., Quint. 1, 6, 40): topper citi ad aedes venimus Circae, Pac. ap. Fest. p. 352 Müll.; so Naev., Enn., Att., Cael. ib.