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open (sth) up

phrasal verb with open
 
/ˈəʊ.pən/
 
US  /ˈoʊ-/ verb

Definition

to open the lock on the door of a building: The caretaker opens up the school every morning at seven.Unfastening and opening
(Definition of open (sth) up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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