KanjiJLPT N2
Sharp

pointed, sharpness, edge, weapon, sharp, violent

Mnemonic

A demon hoards gold coins, filing each one into a razor-thin disc. Each coin becomes so sharp that the demon uses them as throwing blades — slicing through walls, trees, and anything that stands between it and more treasure.
Additional thoughts
Picture a demon obsessively grinding gold coins on a whetstone until every edge gleams with lethal precision. Its greed drives its sharpening — sharp mind, sharp blades, sharp hunger for more.
Quick recall
A demon grinds gold coins into sharp throwing blades.

Details

The keyword for 鋭 is sharp. This kanji refers to something that is keen, pointed, or acute, whether in a physical or figurative sense. It can describe the sharpness of a blade's edge, the acuteness of one's intellect, or the intensity of one's perception. It conveys a sense of piercing precision and cutting effectiveness.
On'yomi
えい
Kun'yomi
するど.い