ŏbustus, a, um, Part. [ob-uro].
I Lit., burnt around , burnt , hardened in the fire (poet.): hic torre armatus obusto, Verg. A. 7, 506: sudes, id. ib. 11, 894.—
II Transf.: glaeba gelu, burnt by frost . Ov. Tr. 5, 2, 66.
ob-ūstus P., burnt into, hardened by fire: torre armatus obusto, V.: glaeba gelu, burnt by fr...
An Elementary Latin Dictionary