Definition of unruinable in US English:

unruinable

adjective

  • That cannot be ruined.

Origin

Late 17th century; earliest use found in Robert Leighton (bap. 1612, d. 1684), archbishop of Glasgow. From un- + ruinable.

Pronunciation

unruinable

/(ˌ)ʌnˈruːɪnəbl/