| 洞口县 | [ dòng koǔ xiàn ] Dongkou county in Shaoyang 邵陽|邵阳[Shao4 yang2], Hunan |
| 洞房花烛 | [ dòng fáng huā zhú ] bridal room and ornamented candles, wedding festivities (idiom) |
| 洞房花烛夜 | [ dòng fáng huā zhú yè ] wedding night |
| 洞若观火 | [ dòng ruò guān huǒ ] lit. to see sth as clearly as one sees a blazing fire (idiom), fig. to grasp the situation thoroughly |
| 洞见 | [ dòng jiàn ] insight, to see clearly |
| 洞鉴 | [ dòng jiàn ] to examine deeply, to inspect closely |
| 洞开 | [ dòng kaī ] to be wide open |
| 洞头 | [ dòng toú ] Dontou county in Wenzhou 溫州|温州[Wen1 zhou1], Zhejiang |
| 洞头县 | [ dòng toú xiàn ] Dontou county in Wenzhou 溫州|温州[Wen1 zhou1], Zhejiang |
| ⇒ 一击入洞 | [ yī jī rù dòng ] hole in one (golf) |
| ⇒ 一杆进洞 | [ yī gān jìn dòng ] (golf) hole in one |
| ⇒ 克孜尔千佛洞 | [ kè zī ěr qiān fó dòng ] Kezil thousand-Buddha grotto in Baicheng 拜城, Aksu 阿克蘇地區|阿克苏地区, Xinjiang |
| ⇒ 别有洞天 | [ bié yoǔ dòng tiān ] place of charm and beauty, scenery of exceptional charm, completely different world |
| ⇒ 吕洞宾 | [ lǚ dòng bīn ] Lü Dongbin (796-), Tang Dynasty scholar, one of the Eight Immortals 八仙[Ba1 xian1] |
| ⇒ 小洞不堵，大洞难补 | [ dòng bù dǔ dà dòng nán bǔ ] If you don't plug the small hole, the big hole will be hard to repair (idiom); A stitch in time saves nine. |
| ⇒ 小洞不堵，大洞难补 | [ dòng bù dǔ dà dòng nán bǔ ] If you don't plug the small hole, the big hole will be hard to repair (idiom); A stitch in time saves nine. |
| ⇒ 小洞不补大洞吃苦 | [ dòng bù bǔ dà dòng chī kǔ ] A small hole not plugged will make you suffer a big hole (idiom); a stitch in time saves nine |
| ⇒ 小洞不补大洞吃苦 | [ dòng bù bǔ dà dòng chī kǔ ] A small hole not plugged will make you suffer a big hole (idiom); a stitch in time saves nine |
| ⇒ 库木吐拉千佛洞 | [ kù mù tǔ lā qiān fó dòng ] Kumutula thousand-Buddha grotto in Kuqa, Xinjiang |
| ⇒ 张之洞 | [ zhāng zhī dòng ] Zhang Zhidong (1837-1909), prominent politician in late Qing |
| ⇒ 水帘洞 | [ shuǐ lián dòng ] cave with a waterfall at its mouth |
| ⇒ 洪洞县 | [ hóng tóng xiàn ] Hongtong county in Linfen 臨汾|临汾[Lin2 fen2], Shanxi |
| ⇒ 无底洞 | [ wú dǐ dòng ] bottomless pit |
| ⇒ 狗咬吕洞宾，不识好人心 | [ goǔ yaǒ lǚ dòng bīn bù shí haǒ rén xīn ] a dog biting Lü Dongbin (idiom), to ill reward a person's kindness |
| ⇒ 空洞无物 | [ kōng dòng wú wù ] empty cave, nothing there (idiom); devoid of substance, nothing new to show |
| ⇒ 窑洞 | [ yaó dòng ] yaodong (a kind of cave dwelling in the Loess Plateau in northwest China), CL:孔[kong3] |
| ⇒ 脑洞大开 | [ naǒ dòng dà kaī ] imaginative, to have one's mind buzzing with ideas |
| ⇒ 藏经洞 | [ zàng jīng dòng ] cave holding scripture depository, part of Mogao cave complex 莫高窟, Dunhuang 敦煌 |
| ⇒ 芦洞 | [ lú dòng ] Rodong or Nodong, series of North Korean medium-range missiles |
| ⇒ 虫洞 | [ chóng dòng ] worm-hole (in cosmology and science fiction) |
| ⇒ 钥匙洞孔 | [ yaò shi dòng kǒng ] keyhole |
| ⇒ 钻洞 | [ zuān dòng ] to bore, to burrow, to crawl through a tunnel |
| ⇒ 门洞 | [ mén dòng ] passageway, archway |
| ⇒ 开脑洞 | [ kaī naǒ dòng ] to blow people's minds with highly imaginative, bizarre ideas |
| ⇒ 电洞 | [ diàn dòng ] electron hole (physics) |
| ⇒ 风洞 | [ fēng dòng ] wind tunnel |
| ⇒ 闹洞房 | [ naò dòng fáng ] disturbing the privacy of bridal room (Chinese custom where guests banter with and play pranks on the newlyweds) |
| ⇒ 龋洞 | [ qǔ dòng ] hole due to dental caries |
| ⇒ 龙洞 | [ lóng dòng ] cave, natural cavern (in limestone) |