incapable of being replaced; unique: an irreplaceable vase.

Is it irreplaceable or irreplaceable?

The adjective irreplaceable describes anything that's one of a kind, particularly if it has deep sentimental value to you, like your grandmother's irreplaceable engagement ring. When you replace something, you get something that's just like it, but if something is irreplaceable, there's just no substitute.

What is it called when something is irreplaceable?

Synonyms & Near Synonyms for irreplaceable. inestimable, invaluable, priceless.