O / obsĕcrātĭo
noun

obsĕcrātĭo

gen. obsĕcrātōnis · gender feminine · decl. 3rd
a beseeching, imploring, supplication, entreaty
In gen., a beseeching, imploring, supplication, entreaty (class.): prece et obsecratione humili uti, Cic. Inv. 1, 16, 22; id. Font. 17, 39: judicum, addressed to the judges, Quint. 6, 1, 33: percipe obsecrationem meam, Vulg. Psa. 142, 1: fit ad Deum pro illis, id. Rom. 10, 1.—
in particular
An asseveration, protestation
An asseveration, protestation, accompanied by an invocation of the gods or of religious things, Gr. δέησις, Cic. de Or. 3, 53, 105; cf. Just. 24, 2, 5; cf. Macr. S. 1, 6, 13.—
A public prayer
A public prayer: obsecrationem indicere, Liv. 27, 11; id. 4, 21; 26, 23; 31, 9; Cic. Har. Resp. 28 fin.: habere, Suet. Caes. 22.