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English definition of “mix sth up”

mix sth up

phrasal verb with mix     /mɪks/ verb
to make a group of things untidy or badly organized, or to move them into the wrong order: Don't mix up the bottles - you'll have to repeat the experiment if you do. Your jigsaw puzzles and games are all mixed up together in that box.Making things dirty and untidy
(Definition of mix sth up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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