get (one's) head around (something)

To understand something that is challenging or confusing. It took a while, but I've finally gotten my head around this chapter in my calculus textbook. Wait, you two are dating now? It's going to take a little while for me to get my head around that!

Common Names:

Name	Pronounced	Usage
Pramod	-	Indian, Hindi, Marathi, Kannada
WacŁAwa	vahts-WAH-vah	Polish
Faysal	-	Arabic
GlÁUcio	-	Portuguese
DraŽEnka	drah-ZHEN-kah	Croatian
Thalita	-	Portuguese (Brazilian)