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English definition of “knuckle under”

knuckle under

informal phrasal verb with knuckle     /ˈnʌk.l̩/ verb
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 Learner's Dictionary & Thesaurus © Cambridge University Press)
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