/ ˈrænsæk; NAmE / verb
[ vn ] ransack sth (for sth) to make a place untidy, causing damage, because you are looking for sth
SYN turn upside down :
The house had been ransacked by burglars.
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WORD ORIGIN
Middle English : from Old Norse rannsaka , from rann house + a second element related to sœkja seek.