be most regrettableとは 意味・読み方・使い方

Eventually, the imperial throne passed to Gotoba's descendant (Emperor Gosaga), so it cannot be said that Gotoba did not achieve his intentions, but it is most regrettable that the imperial Court was brought momentarily to the brink of collapse.発音を聞く 例文帳に追加

結局、皇位は後鳥羽の子孫（後嵯峨天皇）に伝えられ、後鳥羽の本意は達成されなかったわけではないが、朝廷が一旦没落したのは口惜しい。 - Wikipedia日英京都関連文書対訳コーパス