R / rĕprōmissŏr
noun

rĕprōmissŏr

gen. rĕprōmissōris · gender masculine · decl. 3rd
one who answers; promises; a surety
one who answers or promises in return; a surety, bail, Vulg. Ecclus. 29, 21 sq.: vitae aeternae, Ambros. Fid. 4, 11, 154.