spearhead; tip of a spear
Refers to the pointed metal head of a spear. Can also be used figuratively for the leading part of an attack or movement.
The spearhead is shining.
They sharpened the tips of their spears.
Compound of 槍 (spear) + の (possessive particle) + 穂先 (tip of an ear of grain or point of a tool), literally 'the tip of a spear'.