be at the bottom of (something)

To be the fundamental cause of something. Stubbornness is at the bottom of every unresolved disagreement.

Name	Pronounced	Usage
Tymoteusz	ti-maw-TE-uwsh	Polish
Nathanahel	-	Biblical Latin
Ronny	RAH-nee	English
Deiniol	-	Welsh
Clemens	KLE-mens (German)	German, Dutch, Swedish, Norwegian, Danish, Late Roman
Caoilfhionn	KEE-lin	Irish