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.
Rusting is an irreversible process.
The antonym of irreversible would be reversible.
irreversible
Do you mean irreversible change? If so it means "It can not be changed".