Jōyō kanji, Taught in junior high
JLPT level: N1
2143 of 2500 most used kanji in newspapers
Stroke count: 5
Meaning: convex, beetle brow, uneven
Kunyomi: でこ
Onyomi: トツ
Composition: 凵
Radical: 凵
Meaning: container, open mouth
凸 （トツ） convex
凸凹 （デコボコ） unevenness, roughness, ruggedness, bumpiness, inequality, imbalance, unevenness, difference
凹凸 （オウトツ） unevenness, bumpiness, roughness, ruggedness, imbalance, inequality, unevenness, disparity
両凸 （リョウトツ） biconvex
凸 （でこ） brow, forehead, bump
凸凹 （でこぼこ） unevenness, roughness, ruggedness, bumpiness, inequality, imbalance, unevenness, difference