English adjective: changeless
|1.||changeless not subject or susceptible to change or variation in form or quality or nature|
|Samples||The view of that time was that all species were immutable, created by God.|
|2.||changeless unvarying in nature|
|Samples||Maintained a constant temperature.|
Principles of unvarying validity.
|Synonyms||constant, invariant, unvarying|
|3.||changeless remaining the same for indefinitely long times|