Lewis & Short

Bardaei, ōrum, m., an Illyrian people (in Cic. Fam. 5, 9, 2, Vardaei)
Hence, Bardăĭcus, a, um, adj., Bardœan calceus, a kind of soldier’s boot, poet. for the soldiers themselves, Juv. 16, 13 (cf. Caligula)’ cuculli, Capitol. Pertin. 8, 3; cf. bardocucullus.
Absol. Bardăĭcus, i, m., a soldier’s boot, Mart. 4, 4. 5.