Definition of unreducible in English:

unreducible

Pronunciation /(ˌ)ʌnrɪˈdjuːsəbl/ /(ˌ)ʌnrɪˈdʒuːsəbl/

adjective

  • That cannot be reduced.

Origin

Mid 17th century; earliest use found in John Milton (1608–1674), poet and polemicist. From un- + reducible.