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perk up

phrasal verb with perk
 
/pɜːk/
 
US  /pɝːk/ verb [I or T] informal

Definition

to improve or become more exciting: Share prices perked up slightly before the close of trading.Becoming betterMaking things betterMaking progress and advancingMaking things betterBecoming better
(Definition of perk up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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