καυματίζω (< καῦμα), to burn or scorch up: with accusative before ἐν πυρί, Rev.16:8. Pass., Refs Mat.13:14, Mrk.4:6; before καῦμα μέγα, Rev.16:9.† (AS)
Thayer:
1) to burn with heat, to scorch 2) to be tortured with intense heat
καυματίζω
kaumatizō
kow-mat-id'-zo
From G2738; to burn