na-adjective, noun which may take the genitive case particle 'no', noun
Used in scientific, technical, and formal contexts to describe processes, changes, or decisions that cannot be undone. Antonym: 可逆 (reversible).
Antonyms: 可逆
This chemical reaction is irreversible.
The flow of time is irreversible.
reversible · invertible
Compound of 不 (non-) + 可逆 (reversible). 可逆 itself is from 可 (possible) + 逆 (reverse).