Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ŏpĕrīmentum (sync. opermentum; al. oprimentum, Prud. Psych. 461), i, n. [operio], a covering, cover, lid (class.): quibus operibantur operimenta et pallia opercula dixerunt, Varr. L. L. 5, § 167 Müll.: operimenta decem, Cato, R. R. 10: equis paria operimenta erant, Sall. Fragm. ap. Serv. Verg. A. 11, 770: nuces gemino protectae operimento, Plin. 15, 22, 24, § 86: fulmen, quo dolia exhauriuntur intactis operimen tis, the lids, id. 2, 51, 52, § 137: oculorum, id. 8, 42, 64, § 156: testei, id. 11, 37, 55, § 153; a coverlet, covering for a bed: lectuli, Vulg. Deut. 27, 20: de cubili, id. Prov. 22, 27: redditur terrae corpus et ita locatum ac situm quasi operimento matris obducitur, * Cic. Leg. 2, 22, 56.
Trop.: operimenta animae, Ambros. Noë et Arca, 29, § 112.