KanjiJLPT N1
Convex

convex, beetle brow, uneven

Mnemonic

Surface that bulges up in the middle — a convex shape.

Details

The keyword for 凸 is convex. This kanji visually represents a surface or shape that protrudes or bulges outward, the opposite of concave. Its unique form directly depicts the idea of something raised or projecting from a flat plane, much like a bump or a raised center. It is used in scientific, mathematical, and everyday contexts to describe outwardly curved or protruding surfaces.
On'yomi
とつ
Kun'yomi
でこ