vigesimal (adjective)

1. In the vigesimal system, a ritual is performed every twenty years that summons a terrifying monster.

2. The designer created a unique vigesimal-themed collection, with patterns and colors inspired by the number twenty.

3. The ancient temple had a vigesimal layout, with twenty sacred chambers representing different gods.

4. The couple celebrated their twenty-year anniversary with a vigesimal-themed wedding, incorporating the number twenty into every aspect of the ceremony.