Search the dictionary A Chinese word or character, or English Search 11 entries. kǒngdòng 孔洞 small hole in an object kōngdòng 空洞 cavity duōkǒngdòngwù 多孔动物 Porifera (phylum of sponges) duōkǒngdòngwùmén 多孔动物门 phylum Porifera (sponges) duōkǒngdòngwù 多孔動物 Porifera (phylum of sponges) duōkǒngdòngwùmén 多孔動物門 phylum Porifera (sponges) fángkōngdòng 防空洞 air raid shelter kōngkōngdòngdòng 空空洞洞 empty kōngdòngwúwù 空洞无物 empty cave, nothing there (idiom) kōngdòngwúwù 空洞無物 empty cave, nothing there (idiom) kōngdòngdòng 空洞洞 empty