Irreplaceable (adjective)

1. Priceless, invaluable, or having no equal.
2. Unique, one-of-a-kind, or irreplaceable.

Origin:

Derived from the latin word 'irreplacabilis' meaning unable to be replaced.

Examples:

1. The irreplaceable antique vase was passed down from generations in the family.
2. The irreplaceable memories of the trip to Paris would stay with her forever.
3. The irreplaceable talent of the musician was recognized and celebrated worldwide.
4. The irreplaceable contributions of the scientist to the field were widely acknowledged.
5. The irreplaceable role of the teacher in the development of the students was appreciated by all.