忌妒 (jì du): 嫉妬する

When the younger sister saw how many birthday presents her older sister received, she felt a bit jealous and hardly spoke all day.

He admitted that he was jealous of his colleague's promotion, because they had joined the company at the same time, yet the other person became manager first.

Li Ming was jealous of his good friend's new car, so he worked overtime like crazy, wanting to save enough money as soon as possible to buy one himself.

When she saw her classmate win a prize in the competition, she wasn't jealous at all; instead, she was genuinely happy for him.

He was jealous that his neighbor's son got into a famous university, and he always compared his own son with him over this matter.