[That's not exactly a word that Aang knows, mostly because...why use that when there's already firebender? And so rather than ask, he shows.]

[Aang holds up one hand, snaps his fingers, and a small flame forms on the end of one thumb.]

In my world some are born with the ability to control one of the four elements. Air, Water, Earth, and Fire. One person in a generation can control all four, and that's the Avatar.