KanjiJLPT N1
Blind

blind, blind man, ignoramus

Mnemonic

A deceased man's eye is forever blind. Picture the milky, glazed-over eye of a corpse — no light, no color, no sight. When someone is deceased, the first thing you notice is how blind their eyes look, staring emptily at nothing.
Additional thoughts
Death kills sight. A deceased person's eye is the perfect image of blindness — cloudy, still, unseeing. Deceased sits on top, eye on the bottom: sight extinguished by death.
Quick recall
A deceased person's eye is forever blind.

Details

The keyword for 盲 is blind. This kanji refers to the inability to see, representing a condition where one's eyes have lost their function. It can also be used figuratively to describe someone who is ignorant or lacks understanding in a particular area, much as "blind" is used metaphorically in English. The character conveys the idea of eyes that have been rendered useless or obscured from perceiving the world.
On'yomi
もう
Kun'yomi
めくら