unconvertible

English

Etymology

un- +‎ convertible

Adjective

unconvertible (comparative more unconvertible, superlative most unconvertible)

1. That cannot be converted.
   • 1916, James Marchant, Alfred Russel Wallace= Letters and Reminiscences, Vol. 1 (of 2)‎^[1]:

     I can only recommend you to read again Darwin's account of the horse family and its comparison with pigeons; and if that does not convince and stagger you, then you are unconvertible.

   • 1922, Francesco Saverio Nitti, Peaceless Europe‎^[2]:

     If the situation created by the War has transformed also the English circulation into unconvertible paper money, this is merely a passing fact.