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English definition of “knuckle under”

knuckle under

informal
verb uk phrasal verb with knuckle   /ˈnʌk.l̩/ us  
to accept someone's power over you and do what they tell you to doLosing and being defeatedScoring, winning and losing in sport
(Definition of knuckle under from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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