であろうに

would have; if only

→ だ

phrase Rare #42,061

would have; if only A formal or literary expression of regret about an unreal or contrary-to-fact situation. であろう is a formal form of だろう, and に adds a wistful sense such as “if only” or “even though it would have been.”

JA: もっと早く出発していれば、電車に間に合ったであろうに。

EN: If only I had left earlier, I would have caught the train.

もし私にもっとお金があったなら、そのペンを買ったであろうに。

If I had had more money, I would have bought that pen.

もし彼がその事実を知っていたら、事故は避けられたであろうに。

If only he had known that fact, the accident could have been avoided.

どんな音楽家も葬式にその音楽を演奏しようと思わなかったであろうに。

No musician would have thought to play that music at a funeral.

あのころ、もっと一生懸命体を鍛えていたら、彼は今頃はもっと健康であろうに。

If he had worked harder to stay fit back then, he would be healthier now.