凹凸 おうとつ unevenness #14,782 Meanings noun unevenness; bumpiness; roughness; ruggedness imbalance; inequality; unevenness; disparity Its kanji 凹 オウ · くぼ.む、へこ.む、ぼこ concave, hollow, sunken 凸 トツ · でこ convex, beetle brow, uneven