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English definition of “sneak”

sneak

verb [I] (TELL SECRETLY)    /sniːk/ (sneaked or US also snuck, sneaked or US also snuck) UK slang disapproving
to secretly tell someone in authority , especially a teacher , that someone else has done something bad , often in order to cause trouble : She was always sneaking on other kids in the class .Revealing secrets and becoming known
(Definition of sneak verb (TELL SECRETLY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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