Pronunciation /ˈransak/
verb
[with object]
1 Go through (a place) stealing things and causing damage.
1.1 Search (a place or receptacle) thoroughly, especially in such a way as to cause harm.
Origin
Middle English from Old Norse rannsaka, from rann ‘house’ + a second element related to sœkja ‘seek’.
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After ransacking the house, Sid ran with a sack full of loot (including a lute), jumping many a fence on the way to the fence.

[It may be clear to many that I ransack my brain to reveal the reality that words overlap.]