American English

Definition of keep at phrasal verb from the Oxford Advanced American Dictionary

 

keep at

 phrasal verb
phrasal verb
 
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Phrasal Verbs

keep at something

 
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to continue working at something Come on, keep at it, you're nearly finished!

keep somebody at something

 
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to make someone continue working at something He kept us at it all day.
See the Oxford Advanced Learner's Dictionary entry: keep at