Brĭăreus (trisyl.), ei, m., = Βριαρεύς, Callim. Del. 143 (old form Βριάρεως, Hom. Il. 1, 403; v. Crus. Wb. of Prop. Names), the hundred-armed giant, also called Ægœon: centumgeminus, Verg. A. 6, 287 Serv. and Heyne; cf. id. ib. 10, 565: ferox, Luc. 4, 596 Schol.: immensus, Stat. Th. 2, 596; cf. also Ov. M. 2, 10; Claud. Laud. Stil. 1, 304: vastus, Sen. Herc. Oet. 167.
Hence, Brĭă-rēĭus, a um, adj., of or belonging to Briareus: turba, Claud. Rapt. Pros. 3, 188.