ir
Ir- is the most common prefix that is added on reversible. This makes the word irreversible.
no
reversable
irreversible
irreversible change.
IRREVERSIBLE
irreversible change
Burning something is irreversible.
The antonym of irreversible would be reversible.
Rusting is an irreversible process.
irreversible
Do you mean irreversible change? If so it means "It can not be changed".