Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
implācātus (inpl-), a, um, adj. [2. in-placatus], unappeased, unsatisfied, unallayed (poet.): Charybdis, Verg. A. 3, 420: gula, Ov. M. 8, 847.