Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† dĭăbā̆thrum, i, n., = διάβαθρον, a sort of slipper, Naev. ap. Varr. L. L. 7, § 53 Müll. (v. 60 Rib.); cf. Paul. ex Fest. p. 74, 9 Müll.