Read Edit View history 凹進 āojìn concave Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 凹进/ 凹進 āojìn concave concave; recessed; hollowed out Edit Delete 凹进/ 凹進 āojìn to dent to become concave, hollow, or indented Edit Delete References Add reference No references for this word.