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com‧pel‧ling

1 an argument etc that makes you feel certain that something is true or that you must do something about it :
Lucy had no compelling reason to go into town.
compelling reason/argument/case etc
Lucy had no compelling reason to go into town.2 very interesting or exciting, so that you have to pay attention :
3 a strong need, desire etc to do something, making you feel that you must do it :
He felt a compelling need to tell someone about his idea.
compelling need/desire/urge (to do something)
He felt a compelling need to tell someone about his idea. —compellingly adverb
