O / oblĭgāmentum
noun

oblĭgāmentum

gen. oblĭgāmenti · gender neuter · decl. 2nd
a band
Lit., a band (post-class.): caput obligamento obnoxium, Tert. Cor. Mil. 14.—
an obligation figuratively
Trop., an obligation: legis obligamenta, Tert. adv. Marc. 3, 22; Hier. Ephes. 1, 14; Tert. Idol. 15.