This
database is a comprehensive collection of all the American idioms and slang available.
American Idioms are many and varied. We hope you enjoy our collection. We are adding more all the time.
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to pledge to tell the truth about something (in a court of law someone may swear to tell the truth by placing his or her hand on a bible or other religious text)
The man swore on a stack of bibles that he had never seen the accused criminal before.
The word of the law means that the law is interpreted in an absolutely literal way which goes against the ideas that the lawmakers had wished to implement.