vigenary

From Latin vīgēnus (“twenty each”), variant of vīcēnus, + -ary. Cognate with English vicenary and vicenarious.

vigenary (not comparable)

1. Synonym of vicenary, of, pertaining to, or based on the number twenty.

• “vigenary, adj.”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.

• vinegary