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to be at the bottom of something
01
to be the direct cause of something, particularly something unpleasant
Idiom
InformalWhat is the origin of the idiom "be at the bottom of something" and when to use it?
The idiom "be at the bottom of something" has its origin in the idea that the bottom often represents the foundation or root cause of a situation or issue. It is used to suggest that a particular person or thing is the underlying reason or origin of a problem, event, or action.
Example
The detective believed that a personal grudge was at the bottom of the crime.
The lack of funding for the project was at the bottom of its failure to launch successfully.
