1. superlative form of ancient; of the greatest age or earliest origin
Usage: archaic or poetic; modern usage typically prefers 'oldest' or 'most ancient'

Examples

• The ancientest civilizations rose along the Nile and Tigris rivers.
• This is the ancientest manuscript in the library's collection.
• The ancientest trees in the forest are over a thousand years old.
• Scholars debate which is the ancientest written language.
• The ancientest ruins on the island date back to the Bronze Age.