Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prō-pexus, a, um, Part. [pecto], combed forward, combed down in front, hanging down (poet.): crines, Att. ap. Serv. Verg. A. 12, 605: propexam in pectore barbam, Verg. A. 10, 838: propexam ad pectora barbam, Ov. F. 1, 259: propexa mento Canities, Stat. Th. 2, 97: propexis in pectora barbis, Sil. 13, 310.