'Unchanging' definitions:

Definition of 'unchanging'

(from WordNet)
adjective
Conforming to the same principles or course of action over time
adjective
Showing little if any change; "a static population" [syn: static, stable, unchanging]

Definition of 'Unchanging'

From: GCIDE

Synonyms of 'unchanging'

From: Moby Thesaurus