KanjiJLPT N2
Brain

brain, memory

Mnemonic

Under the moon, a villain parts his hair to expose his brain. The moonlight reveals every wrinkle of the pulsing organ beneath his thin hair. The villain taps his brain proudly — this grotesque, throbbing mass is the source of all his evil schemes.
Additional thoughts
Picture the villain under pale moonlight, pulling hair aside to show a visible, pulsating brain. Moon = body radical on the left, hair on top right, villain on bottom right. The exposed brain glowing in moonlight is hard to forget.
Quick recall
A villain parts his hair under the moon, revealing his grotesque, pulsing brain.

Details

The keyword for 脳 is brain. This kanji refers to the physical organ of the brain, the center of the nervous system responsible for thought, memory, perception, and the control of bodily functions. It can also be used more broadly to refer to intellect, mental capacity, or the mind in general. In essence, it encompasses both the anatomical organ and the cognitive faculties associated with it.
On'yomi
のう、どう
Kun'yomi
のうずる