envious

1. Feeling, expressing, or characterized by envy: "At times he regarded the wounded soldiers in an envious way-=@ellipsis4=- He wished that he, too, had a wound, a red badge of courage" (Stephen Crane). See synonyms at jealous.
2. Archaic. Eager to emulate; emulous.

adjective

Resentfully or painfully desirous of another's advantages: covetous, green-eyed, invidious, jealous. See desire.

Definition: jealous, resentful
Antonyms: comfortable, confident, content, kind, pleased, unenvious

The adjective has 2 meanings:

Meaning #1: showing extreme cupidity; painfully desirous of another's advantages
  Synonyms: covetous, jealous, green

Meaning #2: that feels envy of another's possessions
  Synonyms: begrudging, grudging