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view main entry for relentlessadjective  /rɪˈlentləs/
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noun [uncountable]
relentlessness noun [uncountable]Permanence and continuity: permanence, continuity, survival, stability, continuation, preservation, longevity, consistency, eternity, constancyDetermination and ambition: determination, ambition, will, energy, motivation, resolve, aspiration, dynamism, drive, perseverance

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