空洞 kōngdòng vacuous Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: cavity All meanings 3 kōngdòng 3 vacuous 2cavity 1 1 sentence for 空洞 (kōngdòng — cavity) 由于长期的侵蚀,岩石内部形成了一个巨大的空洞。 yóuyú chángqī de qīnshí, yánshí nèibù xíngchéng le yī gè jùdà de kōngdòng. Due to long-term erosion, a huge cavity formed inside the rock. Source: Dong Chinese Dictionary