1570s, from Latin immitigabilis, from assimilated form of in- "not" (see in- (1) + mitigabilis, from past participle stem of mitigare "make mild or gentle" (see mitigate). Related: Immitigably.
雙語例句
1. Her main fault was a brooding, eternal immitigable suspicion of all men, things, creeds and parties.