Chinese character 刎

刎 means cutting at the neck. The older graph 勿 appears in oracle-bone writing—inscriptions made on animal bones and turtle shells for divination—with a sense of cutting or slaughtering, including cattle. Later forms add 刀, the knife component, to make the blade explicit.

Why does 刎颈之交 mean friendship?

The idiom turns a violent image into a life-and-death bond. It comes from a Warring States story recorded in the Shiji, an early Chinese history book: Lian Po and Lin Xiangru reconcile and pledge to share life and death.

The neck-cutting image gives the idiom its extreme stakes; the story supplies the friendship meaning. It reads as a literary, solemn pledge of devotion.

Is 刎 safe to send alone?

Alone, 刎 reads as a violent word, not a friendly reaction. If someone sends only the character, it could be a reference to the word or a classical text; ask for context before treating it as a personal threat.