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English definition of “wall sth up”

wall sth up

verb uk phrasal verb with wall   /wɔːl/ us    /wɑːl/
to fill a space in a wall with brick or stone: We had to wall up an old window.
(Definition of wall sth up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of wall sth up?
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