Immemorial (adjective)

1. Belonging to the distant past and beyond recorded history.
2. Unforgettable or memorable, as if from ancient times.
3. Existing from time immemorial.

Origin:

From latin im- (not) + memorialis (memorial), from memor (mindful, remembering).

Examples:

1. The tradition has been handed down since time immemorial, and no one knows exactly how it started.
2. The mountains, with their immemorial grandeur, made her feel small and insignificant.
3. The immemorial bond between mother and child is one of the most powerful forces in the world.
4. The immemorial beauty of the ancient ruins was a testament to the skill and craftsmanship of the people who built them.
5. The immemorial teachings of the great sages continue to inspire and guide us to this day.