adj. 25B6; adjective
intense heat : EXTREME, great, acute, fierce, severe, high; exceptional, extraordinary; harsh, strong, powerful, potent, vigorous; informal serious.
a very intense young man : PASSIONATE, impassioned, ardent, fervent, zealous, vehement, fiery, emotional; earnest, eager, animated, spirited, vigorous, energetic, fanatical, committed.
mild, apathetic.