From pur; to kindle, i.e. (passively) to be ignited, glow (literally), be refined (by implication), or (figuratively) to be inflamed (with anger, grief, lust) -- burn, fiery, be on fire, try.
see GREEK pur
a. to be on fire, to burn: properly, 2 Peter 3:12; tropically, of the heat of the passions: of grief, 2 Corinthians 11:29 (English Versions burn (often understood of indignation, but cf. Meyer); Winer's Grammar, 153 (145)); of anger, with τοῖς θυμοῖς added, equivalent to to be incensed, indignant, 2 Macc. 4:38 2Macc. 10:35 2Macc. 14:45; to be inflamed with sexual desire, 1 Corinthians 7:9.
b. perfect participle πεπυρωμένος, made to glow (R. V. refined): Revelation 1:15 ((cf. Buttmann, 80 (69) n.)); full of fire; fiery, ignited: τά βέλη ... τά πεπυρωμένα darts filled with inflammable substances and set on fire, Ephesians 6:16 (Apollod. Bib. 2, 5, 2 § 3); melted by fire and purged of dross: χρυσίον πεπυρωμένον ἐκ πυρός, (refined by fire), Revelation 3:18 (so πυρόω in the Sept. for צָרַף; as τό ἀγρυριον, Job 22:25; Zechariah 13:9; Psalm 11:7