If someone is jealous, they feel angry or bitter because they think that another person is trying to take a lover or friend, or a possession, away from them.
She got insanely jealous and there was a terrible fight.
她妒忌得发狂,然后大吵了一架。
If you are jealous of another person's possessions or qualities, you feel angry or bitter because you do not have them.
She was jealous of his wealth.
她嫉妒他的富有。