遺憾千万
- adjectival nouns or quasi-adjectives (keiyodoshi)
遺憾千万
I-adj
1
adjectival nouns or quasi-adjectives (keiyodoshi)
yojijukugo
formal or literary term
extremely regrettable;deeply unfortunate;most disappointing;utterly deplorable
君がそれを知らないのは遺憾千万だ。
It is a great pity that you don't know it.