Ring
noun
A finger ring is the kind of ring you'd put on your finger. That's just simply a "ring" though, so you'll have to know what "ring" this is via context.
ゆびわ
The readings come from the individual vocab readings, 指 and 輪. In English we don't distinguish some other ring from a "finger ring" but in Japanese, you can think of this as two separate words coming together to form one word, which is why it uses the kun'yomi vocab readings like this. So, if you know the individual words, you should be able to figure out this word is read as ゆびわ.
その指輪は彼女の指にぴったり合っていました。
The ring fit perfectly on her finger.
指輪が指から外れなくなってしまいました。
I can't get this ring off of my finger.
「ボーナスが出たら、ダイヤモンドの指輪を買ってやるよ。」「あなたはいつも口先ばかりでしょ。」
"When I get a bonus, I’ll buy you a diamond ring." "You always say that, but words are just words."