chiliad (11. 735)

Via Curious Notions, we learn the above term from the Ancient Greek χῑλιάς for a grouping a thousand things mostly encountered in modern English in the form of chiliastic, a Christian doctrine associated with the a thousand-year period of peace and prosperity the would follow the return of Jesus or—synonymously—believe in an apocalyptic millennium. Used generally to denote large in number or uncountable, it is on tenth of a myriad (M̄, the subject numeral rendered as X̄, with the largest Greek exponent M̄M̄ denoting a hundred million—see previously)), probably from the Greek word for swarming ants (μύρμηξ) and both can be used as a noun or adjective (distinguished in the cases “chiliad reasons” or “a myriad of reasons”) with hyper-pedantically, as with decimate, the former citing exactly a thousand causes and the former meaning a diverse basket of them.