大たい変へん残ざん念ねん

noun

deep regret; great disappointment

A formal, emphatic expression of regret or disappointment, often used in apologies, condolences, or when conveying unfortunate news.

• このたびの結けっ果かは大たい変へん残ざん念ねんに思おもいます。

  I feel deep regret about this outcome.

• ご期き待たいに添そえず、大たい変へん残ざん念ねんです。

  I am very sorry that I could not meet your expectations.