Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* ădumbrātim, adv. [adumbro], sketched in shadow, à la silhouette, in general or in outline (opp. adamussim): quasi adumbratim paulum simulata videntur, as it were covered with shadows, dimly resembling, Lucr. 4, 363.