Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
antĕ-pagmentum or antĭp-, i, n. [pango]; in archit., every thing that is used for garnishing the exterior of a house, as the ornaments about the doors, windows, etc., Cato, R. R. 14; cf. Vitr. 4, 6; Paul. ex Fest. p. 8 Müll.; Müll. Archaeol. § 287.