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
Caedmon	KAD-mən (English)	History
Xanthe	-	Greek Mythology, Ancient Greek
Salih	-	Arabic
Raginmund	-	Ancient Germanic
Prochoros	-	Ancient Greek, Biblical Greek
Pietro	PYE-tro	Italian