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
Gia	-	Italian
Felicia	fə-LEE-shə (English), fe-LEE-thyah (Spanish), fe-LEE-syah (Latin American Spanish), fe-LEE-chyah (Romanian), fe-LEE-see-ah (Swedish)	English, Spanish, Hungarian, Romanian, Dutch, Swedish, Late Roman
Yannic	-	Breton, French
Avalon	AV-ə-lahn	English (Rare)
Malone	[mə'ləun]
Sasho	-	Macedonian, Bulgarian