Definition of unrelentless in English:

unrelentless

adjective

  • Relentless.

Origin

Early 17th century; earliest use found in John Marston (bap. 1576, d. 1634), poet and playwright. Apparently from un- + relentless, perhaps reinforced by confusion of the latter with unrelenting.

Pronunciation

unrelentless

/(ˌ)ʌnrɪˈlɛntləs/