Ge-cafstrian

According to the Old English Dictionary:

ge-cafstrian

p. ode; pp. od [cæfester a halter] To bridle, restrain; frænare, restringere :-- Swelce sió geþyld hæbbe ðæt mód gecafstrod as if patience has restrained the mind, Past. 33, 4; Swt. 218, 22; Cot. MS. 42 a. ge-cafstrian