"I empathize with your problem. I've been through it before." "To emphasize the importance of this section, I've drawn a large circle around the diagram." I can't think of a time I'd logically use "emphasize" followed by "with" though.

Maybe you're looking for 'empathise with'. Please give some idea of why you are looking, and maybe your search will make sense to us.

http://sentence.yourdictionary.com/emphasize take a look at this website :)