洞

dòng

cave

hole; zero (unambiguous spoken form when spelling out numbers); CL:個|个[ge4]

water (氵) + [sound: tóng] (同) = cave hollowed by water

同 mainly lends its sound, approximating dòng. The water radical carries the meaning: water erodes and hollows out rock, leaving behind caves and holes.

氵+同→洞
同SamePhonetic
氵WaterSemantic

山上有一个很深的洞。

shān shàng yǒu yī gè hěn shēn de dòng。

There is a very deep cave on the mountain.

他的袜子上破了一个洞。

tā de wà zi shàng pò le yī gè dòng。

There is a hole worn through his sock.

Words with 洞

老鼠洞

lǎo shǔ dòng

mouse hole

钻洞

zuān dòng

to bore

门洞

mén dòng

passageway

开脑洞

kāi nǎo dòng

to blow people's minds with highly imaginative, bizarre ideas

防空洞

fáng kōng dòng

air raid shelter; bomb shelter

隧洞

suì dòng

tunnel

零日漏洞

líng rì lòu dòng

zero-day vulnerability (computing)

电洞

diàn dòng

electron hole (physics)

风洞

fēng dòng

wind tunnel

闹洞房

nào dòng fáng

disturbing the privacy of bridal room (Chinese custom where guests banter with and play pranks on the newlyweds)

黑洞

hēi dòng

(astronomy) black hole

黑洞洞

hēi dòng dòng

pitch-dark

More characters with 氵

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