遺い憾かん千せん万ばん

Meanings

1

extremely regrettable; deeply unfortunate

yojijukugo (four-character idiom)formal or literary

Formal, literary yojijukugo expressing strong regret or disappointment. Often used in official statements or serious contexts.

今こん回かいの事じ件けんは遺い憾かん千せん万ばんだ。
This incident is extremely regrettable.
遺い憾かん千せん万ばんな結けっ果かに終おわった。
It ended in a deeply unfortunate result.