Wanting what someone else has and resenting them for having it is envy. The cute boy in your art class asks your best friend out on a date. You want to be happy for her; instead you feel bitter envy.
Envy comes from the Latin word invidere, which literally means "look upon." You know when you say something funny or smart and someone gives you a dirty look, the evil eye? Envy all the way. Envy can be used as a noun or as a verb: Envy (noun) is the feeling you have when you envy (verb) what someone else has.
