irredeemable

Concise Oxford English Dictionary © 2008 Oxford University Press:
irredeemable/ɪrɪˈdiːməbl/

▶adjective

• 1 not able to be saved, improved, or corrected.

• 2 (of securities) on which no date is given for repayment of the capital sum.

– derivatives
irredeemability /-ˈbɪlɪti/ noun,
irredeemably adverb.