凸凹

1. Origins, structure, and basic meaning

• Structure: 凸凹 is read as でこぼこ and names an uneven or bumpy condition with raised and sunken areas.
• Basic usage: Use 凸凹している for a bumpy state and 凸凹を滑らかにする for smoothing surface irregularities.

2. Common pitfalls and similar expressions

• Spelling and reading
  • The characters depict projection and depression, but the compound is read as the whole word でこぼこ.
• Not necessarily damage
  • Unevenness may describe a road or a board surface; the word alone does not prove that the object is damaged.