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

= + : Doggy Dog (du) finds two twins (同) have fallen down the cave (洞) in the engine's bathroom ((e)ng4). He immediately begins to dig a tunnel to bring them a bottle of water (氵) until more help arrives.

洞 character breakdown

like / same / similar / together / alike / with

= + 𠮛 : Tommy Turtle (tu) is stapling (冂) a magical scroll (𠮛) to the wall of the engine's kitchen ((e)ng2). On it he wrote that he's looking for two twins (mnemonic symbol for 同).
"water" radical in Chinese characters (Kangxi radical 85), occurring in 沒|没[mei2], 法[fa3], 流[liu2] etc / see also 三點水|三点水[san1 dian3 shui3]

= + : Mnemonic symbol: a bottle of water. Sheldon Shrimp (shu) enjoys a bottle of water (氵) in the Eiffel Tower's living room (ei3). The got the water by scratching (㇀) a blossom (⺀) and catching the leaking dew in a bottle.
see 衚衕|胡同[hu2 tong4]

Characters with 洞 as component

洞 is not used as a component in another character.

Words with 洞

tunnel / cave / burrow / dugout
hole / pit / pothole
small hole in an object
A small hole not plugged will sink a great ship.
A small hole not plugged will make you suffer a big hole (idiom); A stitch in time saves nine.
a small hole not plugged will give you grief when it gets bigger (idiom) / a stitch in time saves nine
If you don't plug the small hole, the big hole will be hard to repair (idiom); A stitch in time saves nine.
A small hole not plugged will make you suffer a big hole (idiom); a stitch in time saves nine
Taepodong, North Korean rocket series

Sentences with 洞

shàng
ba̅
dòng
shén
xia̅n
 
 
zho̅ng
ba̅
dòng
shén
xia̅n
 
 
xià
ba̅
dòng
shén
xia̅n