► 名詞凹凸 [おうとつ]
meaning: bump rank: 2☆
表面に凹凸がある ⇨ There are irregularities on the surface
(☛ Ins and outs, bumps and dips)凸凹 [でこぼこ]
meaning: bump rank: 2☆
道は凸凹だらけだった ⇨ The road was full of bumps and potholes
(☛ Irregularities. Ins and outs, ups and downs)