Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
‡ 1. cohum, i, n., the strap by which the plough-beam was fastened to the yoke; so called, acc. to Paul. ex Fest. p. 39, 4, a cohibendo; cf. Varr. L. L. 5, § 135 Müll.
2. cŏhum poëtae caelum dixerunt a chao, ex quo putabant caelum esse formatum, Paul. ex Fest. p. 39, 5; cf. Varr. L. L. 5, § 19; Diom. p. 361 P.: vix solidum complere cohum terroribus caeli, Enn. Ann. v. 550 Vahl.