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point (of a sword, etc.)
pointed verbal attack
剣の切っ先が喉元に向いた。
The tip of the sword was pointed at his throat.
切っ先を突きつけられて動けなくなった。
With a blade pointed at me, I couldn't move.
武士は切っ先を相手の急所に狙いを定めた。
The samurai trained the tip of his blade on his opponent's vital spot.