irreversible
adj. B2 Upper Intermediate US //ˌɪɹɪˈvɝsəbəɫ// UK //ɪɹɪvˈɜːsəbəl// ir·re·versible
adj. impossible to change back to how it was before. You use this to describe a choice or a physical change that is permanent.
adj. impossible to reverse, undo, or return to a previous condition. Often used in medical, environmental, or legal contexts to describe permanent consequences.
The damage to the old painting is irreversible.
Scientists warn that the melting of the polar ice caps could reach an irreversible tipping point within decades.
While some policy shifts are merely temporary adjustments, the constitutional amendment represents an irreversible change to the nation's legal framework that cannot be undone by a simple majority vote.
From ir- + reversible.
Usage
Often follows a linking verb like 'be', 'become', or 'seem'.