和英辞書

遺憾

adj

feeling a regret that come from a failure of one's intention / feeling a regret with pity, sadness, disappointment, and shame because the result is not one's intention (often used in public addresses)

彼の行動は本当に遺憾なことだ。

His behavior is truly regrettable.

意味（1）

feeling a regret that come from a failure of one's intention

意味（2）

feeling a regret with pity, sadness, disappointment, and shame because the result is not one's intention (often used in public addresses)

その裁判(さいばん)は遺憾(いかん)な結果(けっか)に終(お)わった。

Sono saiban wa ikan na kekka ni owatta.The trial ended with a regrettable result.