irreversible
[adjective]
Synonyms: irrevocable, final, incurable, irreparable, unalterable

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Antonyms: reversible

[TahlilGaran] English Synonym Dictionary ▲

ir‧re‧ver‧si‧ble AC /ˌɪrɪˈvɜːsəbəl◂, ˌɪrɪˈvɜːsɪbəl◂ $ -ɜːr-/ adjective
[Word Family: noun: reversal, reverse; adjective: reverse, reversible ≠ irreversible; verb: reverse]

1. irreversible damage, change etc is so serious or so great that you cannot change something back to how it was before Antonym : reversible:
Fossil fuels have caused irreversible damage to the environment

2. if an illness or bad physical condition is irreversible, it will continue to exist and cannot be cured:
Miller is in an irreversible coma.
irreversible blindness
—irreversibly adverb:
His reputation was irreversibly damaged by the affair.

[TahlilGaran] Dictionary of Contemporary English ▲