
One and only
Unique Importance
Use when something or someone cannot be replaced and holds special significance.
His vintage car was the one and only item he treasured most.
Emotional Weight
Brings strong emotional value to the person or item being described.
The necklace from my grandmother is my one and only keepsake.
Express Uniqueness
Highlights the exclusivity of an event or opportunity.
This concert is the one and only chance to see them live.