Definition of unmitigably in English:

unmitigably

Pronunciation /(ˌ)ʌnˈmɪtɪɡəbli/

adverb

  • Without mitigation; absolutely, utterly; uncompromisingly, implacably.

Origin

Early 19th century; earliest use found in Charles Robert Maturin (1780–1824), writer and Church of England clergyman. From unmitigable + -ly.