The Collaborative International Dictionary
Immitigable
Immitigable \Im*mit"i*ga*ble\, a. [L. immitigabilis; fr. pref.
im- not + mitigare to mitigate.]
Not capable of being mitigated, softened, or appeased.
--Coleridge.
Douglas Harper's Etymology Dictionary
Wiktionary
immitigable
a. That cannot be mitigated
Usage examples of "immitigable".
We cannot but regret that the Swedenborgian view of the future life should be burdened and darkened with the terrible error of the dogma of eternal damnation, spreading over the state of all the subjects of the hells the pall of immitigable hopelessness, denying that they can ever make the slightest ameliorating progress.