Constraint
From BiblePortal Wikipedia
King James Dictionary [1]
Constraint, n. Irresistible force, or its effect any force, or power, physical or moral, which compels to act or to forbear action, or which urges so strongly as to produce its effect upon the body or mind compulsion restraint confinement.
Not by constraint, but by my choice, I came.
Feed the flock of God, taking the oversight thereof, not by constraint, but willingly. 1 Peter 5 .
Webster's Dictionary [2]
(n.) The act of constraining, or the state of being constrained; that which compels to, or restrains from, action; compulsion; restraint; necessity.
