Definition of unreplaceable in English:

unreplaceable

Pronunciation /(ˌ)ʌnrɪˈpleɪsəbl/ /(ˌ)ʌnriːˈpleɪsəbl/

See synonyms for unreplaceable

adjective

  • That cannot be replaced; irreplaceable.

Origin

Early 19th century; earliest use found in Robert Southey (1774–1843), poet and reviewer. From un- + replaceable.