Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prōpălo, no perf., ātum, 1, v. a. [propalam], to make public or manifest, to divulge (post-class.), Sid. Ep. 9, 11: propalata et publica veritas, Oros. 6, 5: divinitus propalatum, Aug. Ep. 137: nondum propalatam esse sanctorum viam, thrown open, Vulg. Heb. 9, 8.