wheel within a wheel

Something that is very complex and perhaps overly complicated. The phrase originated in the Bible. I can't figure out how to turn off this alarm system—it's really a wheel within a wheel.

Common Names:

Name	Pronounced	Usage
Bente	BEN-te (Danish, Norwegian), BEN-tə (Dutch)	Danish, Norwegian, Dutch
Derren	DER-ən	English (Rare)
Rhoda	['rəudə]
Engel	-	German (Rare), Ancient Germanic
Paavo	PAH:-vo (Finnish)	Finnish, Estonian
LonÁN	-	Irish