Thermal energy; the quality or state of being hot.

• High temperature or hot weather.

A building’s heating system.

• The warmth produced by that system.

The hot, burning sensation from spicy food.

Intense pressure, excitement, or public scrutiny.

A preliminary race or round in a competition.

A very fast baseball pitch; a fastball.

Law enforcement, especially when pressure increases; the police.

A firearm; one or more guns.

The period of sexual receptivity in a female mammal; estrus.

One cycle of heating metal to working temperature.

To make something hotter; to warm or heat up.

• To become hotter; to heat up.
• To intensify activity or emotion.

High explosive antitank; a shaped-charge munition for piercing armor.