A loanword from English, used in Japanese to refer to romantic or emotional jealousy, often with a slightly modern or stylish nuance compared to native terms like 嫉妬 (しっと).
彼の女友達にジェラシーを感じる。
I feel jealousy toward his female friend.
They had a fight because of jealousy.
She felt jealousy toward her friend's seemingly happy boyfriend.
He harbored jealousy over his colleague's success.
She sometimes feels jealous of her older sister.