C / cŏ-ŏpĕrātĭo
noun

cŏ-ŏpĕrātĭo

gen. cŏ-ŏpĕrātōnis · gender feminine · decl. 3rd
co-operation
co-operation, Quint. Decl. 16 fin.; Cassiod. Complex. Tit. 1.