Definition of immitigable in English:

immitigable

adjective

archaic
  • Unable to be made less severe or serious.

    ‘the pain was immitigable’

Origin

Late 16th century: from late Latin immitigabilis, from in- not + mitigabilis able to be mitigated.

Pronunciation:

immitigable

/i(m)ˈmidəɡəb(ə)l/