凹凸不平 āo tū bù píng 🔊 uneven (surface); bumpy (road) + Keep this word Meanings āo tū bù píng (idiom) uneven (surface); bumpy (road) Its characters 凹āoconcaveHSK 7–9凸tūto stick outHSK 7–9不bùnot; noHSK 1平píngflat; level; smoothHSK 5