mes ‧ mer ‧ ize BrE AmE ( also mesmerise British English ) /ˈmezməraɪz/ verb [transitive usually in passive]
[ Date: 1800-1900 ; Origin: Franz Mesmer (1734-1815), Austrian doctor who developed hypnotism ]
if you are mesmerized by someone or something, you cannot stop watching them or listening to them because they are so attractive or have such a powerful effect SYN captivate :
The first time I saw Diana I was mesmerized by her beauty.
—mesmerizing adjective