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
Dulcie	DUL-see	English
Chinonso	-	Western African, Igbo
Lovisa	loo-VEE-sah	Swedish
Ekaterine	-	Georgian
Gjon	-	Albanian
Mallory	['mæləri]