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English definition of “gum sth up”

gum sth up

phrasal verb with gum     /ɡʌm/ verb [T] (-mm-) old-fashioned
to prevent something from working or opening in the usual way by covering it with a sticky substance: When I woke up this morning my eyes were all gummed up.Closing and blockingCovering and adding layers
(Definition of gum sth up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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