Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
impāges (inp-), is, f. [in-pag, pango; analogous with compages], the border or frame-work which surrounds the panel of a door, Vitr. 4, 6; cf.: impages dicuntur quae a fabris in tabulis figuntur, quo firmius cohaereant, a pangendo, id est figere, Paul. ex Fest. p. 108 Müll.