空洞 kōngdòng vacuous Origin Definitions Defs Strokes Stroke Words Sentences Sents kōngdòng vacuous 空 kōng adjective impractical impractical; theoretical; unreal; fictitious洞 dòng adjectivenoun thoroughly (bound form) thoroughly; penetratingly; clearlykōngdòng cavity; hollow 空 kōng adjective empty empty; hollow; void of content; containing nothing洞 dòng noun hole hole; cavity; cave