Synonyms of the word 
IRREVERSIBLE → PERMANENT
irreversible
- adj. Incapable of being reversed or turned about or back; incapable of being made to run backward.
- adj. Incapable of being reversed, recalled, repealed, or annulled.
- adj. (thermodynamics) Incapable of being reversed to the original state without consumption of free energy…
permanent
- adj. Without end, eternal.
- adj. Lasting for an indefinitely long time.
- n. A chemical hair treatment imparting or removing curliness, whose effects typically last for a period of…
- v. (transitive, dated) To perm (the hair).
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