heat
noun
°thermal energy.
"This furnace puts out 5000 BTUs of heat."
°The condition or quality of being hot.
"Stay out of the heat of the sun!"
verb
°To cause an increase in temperature of an object or space; to cause something to become hot; often with "up".
"I'll heat up the water."
°to arouse, to excite (sexually).
"The massage heated her up."
synonyms: stoke, warm up