unevenness; bumpiness; roughness; ruggedness
imbalance; inequality; unevenness; disparity
道路の凹凸が激しくて走りにくかった。
The road was so bumpy and uneven that it was hard to drive on.
肌の凹凸が目立つようになったので皮膚科を受診した。
The unevenness of my skin became more noticeable, so I went to see a dermatologist.
壁面の凹凸を均す作業に手間がかかった。
Leveling out the unevenness on the wall took considerable effort.