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
NuallÁN	-	Ancient Irish
Harish	-	Indian, Hindi, Marathi, Gujarati, Kannada, Tamil, Telugu, Malayalam
Ballaster	['bælistə]
Bjartr	-	Ancient Scandinavian
Deb	DEB	English
Amator	-	Late Roman