Revelation of Jesus Christ
From the KJV 1611 with Strong's Concordance
G4451
πύρωσις
purosis
{poo'-ro-sis}
From G4448; ignition, that is, (specifically) smelting (figuratively conflagration, calamity as a test).
burning
Revelation 18:9, 18.
trial
1 Peter 4:12.