1. Ichidan verb, Intransitive verb

   to burn; to burn down; to go down in flames

   このトーストはよく焼けていません。

2. to be roasted; to be thoroughly cooked

3. to be sunburnt; to fade (in the sun)

4. to glow red (i.e. of the sky at sunset)

5. to become hot (from the sun)

6. to be jealous; to be envious

Also written 灼ける【やける】yakeru、妬ける【やける】yakeru、嫉ける【やける】yakeru