Definition of implacable in English:



  • 1Unable to be appeased or placated:

    ‘he was an implacable enemy of Ted's’
    • ‘Do they imagine that the timely renunciation of resolve can placate an implacable foe?’
    • ‘The man who is supposed to be protecting them is somehow their fiercest and most implacable enemy.’
    • ‘Her attitude to the new contracts remained implacable.’
    • ‘But this would also be a process in which constitutional nationalism adopted a harder and more implacable position.’
    • ‘He felt a mixture of anger, frustration and hopelessness at fighting against a seemingly implacable system.’
    • ‘Here there is, as I find, no such opposition and certainly no implacable hostility on mother's part.’
    • ‘Your nation endured the blitz to prevail over an implacable foe.’
    • ‘Rationally, most people understand that civilised life in this country faces a heartless and implacable foe who is prepared to strike as often and as cruelly as possible.’
    • ‘Hardly a week goes by without some industry organisation stating its implacable opposition to the idea.’
    • ‘He was conscious though, and gave her a glare of implacable hatred.’
    • ‘When the young girl refuses, the two become implacable opponents.’
    • ‘Jack, resolute, determined, implacable, was never much for glad - handing.’
    • ‘Yet the market remains implacable - febrile and unknowable.’
    • ‘I am an implacable opponent of most of what this government does.’
    • ‘And what he saw inspired in him a deadly, implacable hatred.’
    • ‘Investigations by The Sunday Times indicate that he will face implacable opposition from every Premiership club.’
    • ‘Maybe they see insects as implacable foes, sure to strike fear in the hearts of enemies.’
    • ‘In more civilized times even the most implacable enemies were treated with dignity.’
    • ‘Today's enemy, however, is not a philosophy that condemned millions, but an implacable, unappeasable, pitiless fanaticism that exists on the very fringes of humanity.’
    • ‘It is easy dealing with an implacable enemy.’
    unappeasable, unpacifiable, unplacatable, unmollifiable, unforgiving, unsparing, grudge-holding
    inexorable, intransigent, adamant, determined, unshakeable, unswerving, unwavering, inflexible, unyielding, unbending, uncompromising, unrelenting, relentless, ruthless, remorseless, merciless, pitiless, heartless, cruel, hard, harsh, stern, steely, tough
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    1. 1.1 Unable to be stopped; relentless:
      ‘the implacable advance of the enemy’
      • ‘This madness is the implacable and relentless determination to kill insight and awareness, even at the expense of destroying the island they depend on.’
      • ‘But his hostility to the devil is implacable, utter, and steely.’
      • ‘English fortresses fell one by one before his implacable determination.’
      • ‘The movie's pace is as relentless and implacable as its villain.’


Late Middle English: from Latin implacabilis, from in- not + placabilis (see placable).