遺い憾かん千せん万ばんConjugationsMeaningsNa-adjective1. extremely regrettable; deeply unfortunate; most disappointing; utterly deplorable (Yojijukugo, Formal)Kanji used遺legacy憾remorse千thousand万ten thousandComposed of遺い憾かんregrettable; unsatisfactory; deplorable; lamentableNa-adjective千せん万ばんexceedingly; extremely; very many; indeedNounExamples1君きみがそれを知しらないのは遺い憾かん千せん万ばんだ。It is a great pity that you don't know it.