noun
edge of a blade; cutting edge
Refers to the sharpened edge of a knife, sword, or other bladed tool. Often used in contexts of sharpness, cutting ability, or the physical tip/edge.
包丁の刃先が欠けてしまった。
The edge of the kitchen knife got chipped.
彼は刃先を砥石で研いだ。
He sharpened the blade's edge on a whetstone.