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English definition of “sit by”

sit by

verb uk phrasal verb with sit   /sɪt/ (present participle sitting, past tense and past participle sat) us  
to fail to take action to stop something wrong from happening: I can't just sit by and watch you waste all our money.Passive and not working
(Definition of sit by from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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