Roof Definition
- To grow, intensify, or rise to an enormous, often unexpected degree: 
Operating costs went through the roof last year.
 - To become extremely angry: 
When I told her about breaking the window, she went through the roof.
 
- To be extremely noisy and boisterous: 
They raised the roof at the party.
 - To complain loudly and bitterly: 
Angry tenants finally raised the roof about their noisy neighbors.
 
- to become suddenly or violently angry
 
- to be very noisy, as in applause, anger, celebration, etc.
 - to complain loudly
 
- at or to an extremely high point or level 
a TV show with ratings through the roof
 
Idioms, Phrasal Verbs Related to Roof
- go through the roof
 - raise the roof
 - hit the roof
 - raise the roof
 - through the roof
 
Origin of Roof
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From Middle English rof, from Old English hrōf (“roof, ceiling; top, summit; heaven, sky"), from Proto-Germanic *hrōfÄ… (“roof"), from Proto-Indo-European *krāpo- (“roof"), from Proto-Indo-European *krāwǝ- (“to cover, heap"). Cognate with Scots ruif (“roof"), Dutch roef (“a cabin, wooden cover, deckhouse"), Low German rof (“roof"), Icelandic hróf (“a shed under which ships are built or kept, roof of a boathouse").
From Wiktionary
 Middle English from Old English hrōf
From American Heritage Dictionary of the English Language, 5th Edition
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From Mandarin Chinese 危宿 (WÄ“ixiù)
From Wiktionary
 
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