To start (a fire) or light (a torch, a match, coals, etc.).
To arouse or inspire (a passion, etc).
To begin to grow or take hold.
To bring forth young; to give birth.
A group of kittens.
pregnant
To become hot again after having cooled off (also in figurative senses).
To heat something after it has cooled off, especially previously cooked food (also in figurative senses).
An afterburner.