πυρόω, -ῶ
(< πῦρ), [in LXX chiefly for צרף;]
to set on fire, burn up. In NT always pass.,
1. to be set on fire, to burn: Eph 6:16, II Pe 3:12; ptcp., glowing, Re 1:15. Metaph., of grief or indignation, II Co 11:29; of lust, I Co 7:9.
2. Of metals (cf. Jb 22:25, Ps 11 (12):7, Za 13:9), to be refined or purified by fire: Re 3:18 (and so in RV, Re 1:15, but v. supr.).†