(a.) Extending beyond the reach of memory, record, or tradition; indefinitely ancient; as, existing from time immemorial.

acknowledged admitted age-old ageless ancient antique auld ceaseless coeternal constant continual continuous conventional customary dateless early elderly endless erstwhile established eternal eterne ever-being ever-durable ever-during everlasting everliving fixed folk fore former hallowed handed down heroic hoary incessant indestructible infinite interminable inveterate late legendary long-established long-standing mythological never-ceasing never-ending nonstop nonterminating nonterminous of long standing of old of the folk of yore olamic old old as Methuselah old as history old as time old-time olden once onetime oral past perdurable permanent perpetual prehistoric prescriptive previous primeval primitive prior quondam received recent recognized rooted sempiternal sometime steady then time-honored timeless traditional tried and true true-blue unceasing understood unending unintermitting uninterrupted unremitting unwritten venerable without end worshipful