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The noun "jealousy" can be both countable and uncountable.

jealousy → uncountable

Meaning: unhappiness felt when you think someone you like wants somebody else, or when someone else has something you want

Example sentence: Michael had trouble hiding the jealousy he felt when he heard about his brother's success in business.

jealousy → countable

Meaning: an action or comment that shows jealousy

Example sentence: Jenny said she was sick of all her boyfriend's petty jealousies, and was going to leave him.

Quick Quiz:

In which sentence is the word "jealousy" uncountable?

a. People who've been cheated on in the past are more likely to experience jealousy.

b. Her many jealousies resulted from her fear of being cheated on.

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Contributor: Matt Errey