changeless
/ˈtʃeɪndlɪs/Definitions
1. adjective
not subject to or capable of change
“Her changeless commitment to the cause earned her admiration from everyone.”
2. noun
something that is unchanging
“The changeless beauty of the mountains inspired many artists.”
3. adverb
in a way that does not change
“The company’s changeless policy on refunds was a major point of contention.”