used in 洪洞[Hong2 tong2] (the name of a place in Shanxi)

cave; cavern

(astronomy) black hole

cavern; cave

leak; hole; gap; loophole

cavity; empty; vacuous

insight

air raid shelter; bomb shelter; (fig.) place that protects bad people; hideout

see 洞口縣|洞口县[Dong4 kou3 Xian4]

cave mouth; tunnel entrance

secret inner room; bridal room

to dig a hole

to see clearly

tunnel; cave; burrow; dugout

to bore; to burrow; to crawl through a tunnel

to clearly understand

a cave

hole; pit; pothole

ear piercing hole; earring hole

hole in ice; crevasse

cavity; pit

variant of 涵洞[han2 dong4]

small hole in an object

to punch a hole; to drill a hole; to dig a hole; to burrow

tree hollow; (slang) anonymous platform for sharing secrets; (slang) confidant

paradise; heavenly or beautiful place; fairyland

see 洞頭區|洞头区[Dong4 tou2 Qu1]

cave; pit; (coll.) greenhouse

hole

cave dwelling; legendary abode of immortals

to be wide open

lienteric diarrhea (TCM)

to penetrate; to pierce; to see clearly; to have an insight into

olm (Proteus anguinus)

insight; to see clearly

to examine deeply; to inspect closely

see 洪洞縣|洪洞县[Hong2 tong2 Xian4]

culvert

(geology) solutional cave (typically, a limestone cave)

dog door

electron hole (physics)

white hole (cosmology)

cave; cavern

a hole

pierce

yaodong (a kind of cave dwelling in the Loess Plateau in northwest China); CL:孔[kong3]

Rodong or Nodong, series of North Korean medium-range missiles

(physics) wormhole

passageway; archway