immemorial

1. (sometimes postpositive) That is beyond memory; ancient.Examples: "The rocks had stood overlooking the valley since time immemorial."; "We will ride this morning to what we call the grove of Daphne. It is a real laurel grove. Some of the trees must be immemorial, and deserve to have been sacred, if once they were not so."; "...the fact of the immemorial taking of the toll, though it would be rightful in its origin if the spot was in a port, and wrongful if it was not in a port, did not of itself afford sufficient ground for inferring that the spot was an antient port, or that such special services were rendered, either by express stipulation in some lost grant, or by immemorial usage, as would support such a grant or custom."not-comparablepostpositionalsometimes