unchanging
The laws of physics are unchanging throughout the universe.
The laws of physics do not change no matter where you are in the universe.
Remaining the same over time; not changing or varying.
The unchanging rhythm of the tides fascinates marine biologists.
The fact that tides follow a consistent pattern without variation is studied by marine biologists.
Her unchanging dedication to the project impressed her colleagues.
The fact that she remained consistently dedicated to the project impressed her colleagues.
Often used to describe abstract concepts like laws, principles, emotions, or personal traits that remain constant.
Collocations
Pro Tip
Common Mistake: 'unchanging' vs. 'unchanged'
'Unchanging' describes a state of not changing (e.g., 'the unchanging laws of nature'). 'Unchanged' describes something that has not been altered (e.g., 'the document remains unchanged').
Gold Rule
Use 'unchanging' for ongoing states
Use 'unchanging' to describe something that is currently in a state of not changing, not something that has been static in the past. For past states, use 'unchanged'.
Word Origin
From Middle English 'unchangyng', from Old English 'unchangend' (present participle of 'unchangian', meaning 'not to change'), from 'un-' (prefix meaning 'not') + 'changian' (to change). The word has been in use since the 14th century.
Usage Notes
Used in both literal and figurative contexts. In scientific or technical writing, it often describes natural laws or constants. In personal contexts, it can describe someone's unwavering character or emotions.