Sworn
From BiblePortal Wikipedia
King James Dictionary [1]
Sworn, pp. of swear. The officers of government are sworn to a faithful discharge of their duty.
Sworn friends, is a phrase equivalent to determined, close or firm friends.
I am sworn brother, sweet,
To grim necessity.
Sworn enemies, are determined or irreconcilable enemies.
Webster's Dictionary [2]
(1): p. p. of Swear.
(2): ( p. p.) of Swear