KanjiJLPT N1
Blade

blade, sword, edge

Mnemonic

A single drop of blood slides down the sword—proof that its blade is impossibly sharp. You barely grazed the edge, yet that one crimson drop tells you everything: this blade can slice through anything it touches.
Additional thoughts
Picture the drop sitting right on the sword's edge, emphasizing that the blade is the razor-thin cutting line. The drop is tiny, just like the small stroke that distinguishes 刃 from 刀.
Quick recall
A drop of blood on the sword reveals the blade is razor-sharp.

Details

The keyword for 刃 is blade. This kanji refers to the sharp cutting edge of a knife, sword, or other weapon. It represents the part of a tool or weapon that has been honed to a fine edge for the purpose of cutting or slicing. By extension, it can also refer to a sword or edged weapon in general.
On'yomi
じん、にん
Kun'yomi
は、やいば、き.る

Used in kanji