Jealous
/dʒˈɛləs/
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Definition
(adj) Suspecting rivalry in love; troubled by worries that one might have been replaced in someone's affections; suspicious of a lover's or spouse's fidelity.
Sentence Examples
The other girls are jealous of Lily because she is extremely pretty.
Everybody was jealous of my success.
CEFR Practice Quiz
The young boy felt ____ of his older brother, who got a new bicycle for his tenth birthday.