adjective
- very watchful or careful in guarding or keeping: jealous of one's rights
- resentfully suspicious of a rival or a rival's influence: a husband jealous of other men
- resentfully envious
- resulting from such feelings: a jealous rage
- Now Rare requiring exclusive loyalty: the Lord is a jealous God
Origin:
ME jelous < OFr gelos < ML zelosus: see zeal