brontia
From LSJ
ὑπόσχεσιν τὸ πρᾶγμα γενναίαν ἔχει → the affair holds a noble promise
brontia: v. brontea. ‡† Bronton, ontis, adj., = Βροντῶν (the thunderer),
I an epithet of Jupiter, Inscr. Grut. 34, 5; 17, 12; Inscr. Orell. 1272.
*brontia, ae. f. :: 雷寶石