Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Perseus.
cŏ-ŏpĕror, ātus sum, 1,
- I. v. dep., to work with or together, combine, unite (late Lat.): praedicaverunt ubique, Domino coöperante, Vulg. Marc. 16, 20; Cassiod. Hist. Eccl. 9, 19.
- II. Transf., of things: quoniam fides coöperabatur operibus ejus, Vulg. Jac. 2, 22: diligentibus Deum omnia cooperantur in bonum, id. Rom. 8, 28.