beyond (one's) ken

Advanced beyond one's ability to understand or make sense of the subject matter or task at hand. The stuff they're teaching in this advanced math class is beyond my ken.

Common Names:

Name	Pronounced	Usage
Mcleod	[mək'laʊd]
Terese	te-RES (Swedish)	Basque, Swedish, Norwegian, Danish
Hana (4)	hah-nah	Korean
Zdravka	-	Croatian, Serbian, Slovene
Milada	-	Czech
Escobar	[es'kɔvɔr]