'Apply heat' has more than one meaning. Literally, increasing the temperature of food through micro-waving or cooking is one meaning. Making a person sweat from fear is another kind of ‘heat’.
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pructus"put on the heat"The sentence is grammatically correct. Without surrounding text, my first assumption would be that this is the landlord advising his tenant that he plans to turn on the furnace or electric heater. The ‘threat’ might be that the temperature in the house/apartment/flat would be uncomfortable. The demands might be that the occupant tur
pructusThanks a lot, wilpeter!!So, to you, the two sentences sound to mean "to put physical heat on, to increase the heat", not "to put mental pressure on"?They do to me. The "to put mental pressure on" definition is unusual and might be old fashioned or used in some regional varieties of English. It's not used by all native speakers.