calentar
/kalenˈtaɾ/ · B1 · verb
to heat, to warm up
🔥 Same root as calorie and cauldron: Latin calere, to be warm
Calentar comes from caliente (hot), from Latin calere. English kept that root in calorie (a unit of heat) and cauldron (a pot for heating things). The same verb also covers warming up before exercise.