irreparable
Concise Oxford English Dictionary © 2008 Oxford University Press:
irreparable /ɪˈrɛp(ə)rəb(ə)l/
▶adjective impossible to rectify or repair.
– derivatives
irreparability /-ˈbɪlɪti/ noun,
irreparably adverb.
irreparability /-ˈbɪlɪti/ noun,
irreparably adverb.
'irreparable' also found in these Oxford entries:

