adj. 25B6; adjective UNCHANGING, unvarying, timeless, static, fixed, permanent, constant, unchanged, consistent, uniform, undeviating; stable, steady, unchangeable, unalterable, invariable, immutable.
variable.
CHANGELESS
Meaning of CHANGELESS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012