Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cumprīmē, adv., especially, particularly, Quadrig. ap. Gell. 17, 2, 14: adprime crebrius est, cumprime rarius, traductumque ex eo est, quod cumprimis dicebant pro eo, quod est imprimis, Gell. ib.