This vocab is made from a single kanji, which means it shares the same meaning as the parent kanji: fire.
Since this word is made up of a single kanji, it uses the kun'yomi reading. When learning the kanji, you didn't learn that reading, so here's a mnemonic to help you with this word:
What comes off of fire? Lots and lots of heat (ひ). Feel it coming off the fire, touching and warming your face.
I lit the candle.
It took five days to extinguish the fire.
You're good at lighting the stove.