gum sth up Meaning in the Cambridge English Dictionary
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Meaning of “gum sth up” in the English Dictionary

"gum sth up" in British English

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gum sth up

phrasal verb with gum uk   us   /ɡʌm/ verb [T] (-mm-) old-fashioned
to ​prevent something from ​working or ​opening in the ​usual way because of being ​blocked or ​stuck : When I ​woke up this ​morning my ​eyes were all ​gummed up.
(Definition of gum sth up from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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having male and female students being taught together in the same school or college rather than separately

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