irredeemable

那家公司的债务问题已经无法挽回了。

The company's debt situation is completely ___irredeemable.

他的行为如此恶劣，已经无可救药了。

His behavior was so terrible that he became ___irredeemable.

这些债券现在无法兑现，因为它们被宣布为不可赎回。

These bonds are now worthless as they were declared ___irredeemable.