Irreversible
Not able to be undone or altered; in thermodynamics, a process that cannot be reversed to restore both the system and its surroundings to their initial states without leaving a net change in the universe.
Thermodynamically, all real-world processes are irreversible due to factors like friction, heat loss, and the increase of entropy. An ideal 'reversible' process is a theoretical construct for analysis.
Word relationships
- Permanent: Lasting indefinitely; 'irreversible' emphasizes the inability to undo rather than just duration.
- Unalterable: Cannot be changed; 'irreversible' specifically means cannot be reversed to a prior state.
- Fixed: Set in place; 'irreversible' implies a fundamental inability to go back.
- Reversible: Able to be undone or altered, especially without leaving a net change in the universe.
- Temporary: Lasting for only a limited period of time.
Word family
- irreversibly (adverb): in an irreversible manner
- irreversibility (noun): the quality or state of being irreversible
Collocations
- irreversible change
- irreversible damage
- irreversible process
- irreversible decision
- irreversible decline
Example sentences
- "The expansion of a gas into a vacuum is a classic example of an irreversible process, as it cannot be undone without external work." Describing a fundamental thermodynamic concept.
- "Damage to the brain caused by a severe stroke is often irreversible, leading to permanent functional loss." In a medical context.
Memory hook
IR-REVERSIBLE: IR-resistibly, it can't be REVERSED. Cannot Undo
When not to use
As a casual synonym for 'difficult to reverse' if the possibility of reversal, however hard, still exists. 'Irreversible' implies fundamentally impossible to undo without external impact on the universe.
Fun facts
- The concept of irreversibility is closely linked to the second law of thermodynamics and the increase of entropy.
- Many everyday processes, like cooking an egg or burning wood, are irreversible.
Related words
Explore more words
irrevocable, irredeemable, immutable, degenerative, unsustainable, dissipate
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