adj. unappeasable, unmollifiable, unpacifiable, unforgiving, intractable, uncompromising, inflexible, inexorable, unyielding, unrelenting, ruthless, cruel, pitiless, merciless, hard, rigid, unsympathetic, uncompassionate Ever since that incident at school he has been my implacable enemy
IMPLACABLE
Meaning of IMPLACABLE in English
Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012