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English definition of “muddle sth up”

muddle sth up

phrasal verb with muddle     /ˈmʌd.l̩/ verb
C2 to arrange things in the wrong order : I've arranged the books alphabetically so don't muddle them up.Making things dirty and untidy
(Definition of muddle sth up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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