immutable
adjective
1. not subject or susceptible to change or variation in form or quality or nature
- the view of that time was that all species were immutable, created by God
Similar word(s): changeless
2. constant and unchanging
- the immutable laws of nature
Similar word(s): constant
Sentences with immutable as an adjective:
- The government has enacted an immutable law.
noun
1. Something that cannot be changed.