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ものなら

if ... could

→ 物
phrase Rare #25,865
if ... could Often follows a potential verb to express a hypothetical possibility; after a volitional form, it can mean “if you dare to…”
JA: できるものなら、もう一度やってみて。
EN: If you can, try it one more time.

その問題が解けるものなら解いてみろ。

If you think you can solve that problem, go ahead and try.

彼が生き返るものなら

If only he could come back to life.

— シカゴ (2002)

やれるものならやってみな！！

If you think you can, go ahead and try!!

— M - Eine Stadt sucht einen Mörder (1931)

呪いが消えるものなら私もそうしよう

If that will make the curse disappear, I’ll do it too.

— もののけ姫 (1997)

「君がすべて僕のものならいいのにな」と小さな黒ウサギは言った。

“I wish you were all mine,” said the little black rabbit.

その伝言が重要なものなら彼に電話しなさい。

If the message is important, call him.

この事誰かに言おうものなら、絶交だからね。

If you tell anyone about this, we're through.