Idiom: what makes someone tick
— I wonder what makes my father-in-law tick. He never says anything and shows little emotion.
— Historians have tried for years to understand what makes the world's dictators tick.
— Years of therapy never helped me understand what makes me tick.
— Investigators worked together to study clues about what made the serial murderer tick in order to try to capture him.
— I love reading sports biographies to understand what makes the greatest athlete's tick.
— A love of cooking is what made our grandmother tick.
— I'm married to the man and I still have no idea what makes him tick.
— Ms. Brown is a fascinating woman. Do you have any idea what makes her tick?
— I wish I hadn't read her diary but I wanted to know what made her tick.
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