凹凸 āotū▶ lồi lõm

Stroke order

凹凸 is written in 10 strokes across 2 characters.

• 凹 — 5 strokes
• 凸 — 5 strokes

Senses

1. concave or convex
2. bumps and holes
3. uneven (surface)
4. rugged

Related words

• 昂贵đắt tiền
• 熬Đun sôi, sôi

凹凸 is pronounced āotū and means “lồi lõm”. It belongs to the HSK 6 vocabulary, one of the six bands of the Hanyu Shuiping Kaoshi, China’s official Chinese proficiency exam. Recognising 凹凸 on a page and producing it in conversation are different skills, and only the second holds up when someone is waiting for an answer — so LexiTrail brings it back just as your memory of it starts to fade, not on a fixed weekly rota.