also: てつりん
metal ring; metal hoop; metal band
General term for a circular metal band or ring, used in various contexts like hardware, construction, or crafts.
The bucket is fitted with a metal hoop.
trivet
Only with reading かなわ
Specifically a metal trivet or stand placed under a hot pot or kettle. Often read かなわ.
Place the hot pot on the trivet.
train wheel
Only when written 鉄輪 · Only with reading てつりん
Refers to the wheel of a train or railway vehicle. Read てつりん.
The train wheels roll smoothly on the rails.
I set the hot pot down on the trivet.
金輪を溶接して鎖をつなぐ。
Weld metal rings to connect the chain.
The train wheels turn noisily on the rails.
車輪 is the general word for any vehicle or machine wheel, while 金輪 (read てつりん here) specifically denotes a train's metal wheel.
リング is the katakana loanword for a ring (jewelry, boxing, etc.), while 金輪 is the older native term for a metal hoop or band, often in a craft or industrial context.
General kanji spelling for metal ring/hoop/band and trivet.
Alternate kanji spelling for metal ring/hoop/band and trivet, emphasizing iron/steel.
Specific reading and spelling for train wheel.
Compound of 金 (kana, 'metal') + 輪 (wa, 'ring/hoop'). The reading てつりん uses 鉄 (tetsu, 'iron') + 輪 (rin, 'wheel/ring').