Meaning of IRRETRIEVABLE in English

IRRETRIEVABLE

[adjective] [not gradable] - impossible to correct or return to an existing situation or conditionI agree things look difficult, but the situation is far from irretrievable.Once waste materials have become mixed, certain substances become virtually irretrievable.The couple separated on the grounds of irretrievable breakdown (of their marriage).

Cambridge English vocab.      Кембриджский английский словарь.