The state of being extremely old or ancient. It can be used to indicate time periods or for the graying and whitening of hair due to old age.
1) The old man told a hoary tale of revenge.
2) He bowed his hoary head.
From Old English hoar which means 'ancient'.
Aged, age-old, antique, dateless, hoar, ancient, immemorial, antidivulian, vernerable
Modern, new, recent