G2303
θεῖον
sulfur
θεῖον, -ου, τό [in LXX; Gen.19:24, Deu.29:23 Job.18:15, Psa.11:7, Isa.30:33 34:9, Eze.38:22 (גׇּפְרִית), 3Ma.2:5 * ;] brimstone: Luk.17:29 (LXX), Rev.9:17-18 14:10 19:20 20:10 21:8.† (AS)
The KJV translates G2303 in the following manner:
brimstone (14x)
Full Thayer's lexicon entry
θεῖον — theîon
θεῖον, θείου, τό (apparently the neuter of the adjective θεῖος equivalent to divine incense, because burning brimstone was regarded as having power to purify, and to ward off contagion (but Curtius, § 320 allies it with θύω; cf. Latinfumus, English dust)), brimstone: Luk 17:29; Rev 9:17; Rev 14:10; Rev 19:20;;. (Gen 19:24; Psa 10:6; Eze 38:22; Homer, Iliad 16, 228; Odyssey 22, 481, 493; (Plato) Tim. Locr., p. 99 c.; Aelian v. h. 13, 15 (16); Herodian, 8, 4, 26 (9 edition, Bekker).)
7 occurrences
Luke (1), Revelation of John (6)