1. a person or thing that ruins or destroys something

Examples

• The heavy rain was the ruiner of our picnic plans.
• He’s known as the ruiner of every party he attends.
• That critic is a real ruiner of movies for me.
• The scandal made him the ruiner of his own career.
• Don’t be a ruiner – let them enjoy the surprise.
• The leak was the ruiner of the roof and ceiling.