point of sword, sharp point
釯 centers on the sharp tip of a blade, specifically the point of a sword or any sharp point.
釯 combines 金 (metal) with 亡, which likely contributes a phonetic element. The character is a variant of 鋩, where the right side is 芒 instead of 亡. The exact historical development is uncertain.
The left side 金 is metal, and the right side 亡 looks like a sharp, piercing shape. Imagine a metal blade with a deadly sharp point.
For ボウ, picture a bow (as in bow and arrow) with a metal tip: bow -> ボウ, and the arrow's sharp point is made of metal.