Meaning
denotes "a burning heat" (from kaio, "to burn;" cp. Eng., "caustic," "cauterize"), Mat 20:12, Luk 12:55 (AV, "heat"), RV, in each place, "scorching heat" (marg. "hot wind"); in Jam 1:11, "a burning heat," AV, RV, "the scorching wind" like the sirocco. Cp. Amo 4:9, where the Sept. has purosis, "burning" (pur, "fire"). See BURNING.
"heat" (akin to No. 1), signifies "the result of burning," or "the heat produced," Rev 7:16, Rev 16:9; cp. kaumatizo, "to scorch," kausis, "burning," kauteriazomai, "to brand, sear."
denotes "warmth, heat," Act 28:3 (Eng., "thermal," etc.).
was used as a medical term, of "a fever;" in the NT, "to burn with great heat" (akin to A, No. 1), said of the future destruction of the natural elements, 2Pe 3:10, 2Pe 3:12, "with fervent heat," Passive Voice, lit., "being burned."