凹おうTop 45000MeaningsPrefix1. concave; hollow; sunkenKanji used凹concavePitch accentおうUsed in vocabulary凹おう眼がん鏡きょうconcave glassesNoun凹おう版はん印いん刷さつintaglio printingNoun凹おう多た角かく形けいconcave polygon; non-convex polygonNoun彫ちょう刻こく凹おう版はんcopperplate engravingNoun