irreplaceable

/ˌˈɪ(r)rəˌpleɪsəbəl/

/ɪrəˈpleɪsəbəl/

Other forms: irreplaceably

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. It might be a special thing given to you by a loved one, like your great-grandfather's pocket watch or something that can't be made again, like an irreplaceable painting or an old floor made from a species of wood that's no longer harvested.

Definitions of irreplaceable

1. adjective

   impossible to replace
   “irreplaceable antiques”

   synonyms: unreplaceable

   unexpendable

   not suitable to be expended

   antonyms:

   replaceable

   capable of being replaced

   expendable

   suitable to be expended

   exchangeable, interchangeable, similar, standardised, standardized

   capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability