#1 changeless a. [immutable] 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". wn
#2 changeless s. [constant, invariant, unvarying] unvarying in nature; "maintained a constant temperature"; "principles of unvarying validity". wn
#3 changeless s. [unalterable] remaining the same for indefinitely long times. wn
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