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under the knife
01
ひどい打撲傷または怪我をしている
used when someone is about to undergo a medical operation
What is the origin of the idiom "under the knife" and when to use it?
The idiom "under the knife" originated from the field of surgery, where the knife represents the surgical instrument used for incisions. It has been used metaphorically since the early 20th century to refer to undergoing a surgical procedure. It is used to describe the act of undergoing a surgical operation or procedure. It implies that someone is undergoing a medical intervention that involves the use of a surgical instrument, such as a scalpel.
例
The patient consented to be put under the knife to remove the tumor.
