noun
Refers specifically to the pointed tip of an arrow, typically made of metal or stone.
遺跡から鉄の矢じりが出土した。
An iron arrowhead was excavated from the ruins.
矢じりを研いで鋭くする。
Sharpen the arrowhead to make it pointed.
Compound of 矢 (ya, 'arrow') and 尻 (shiri, 'buttocks; rear'), here referring to the tip or end of the arrow. The reading じり is a rendaku form of しり.