"unvarying" in the adjective sense
1. changeless, constant, invariant, unvarying
unvarying in nature
"maintained a constant temperature"
"principles of unvarying validity"
2. unvaried, unvarying
lacking variety
3. uniform, unvarying
always the same showing a single form or character in all occurrences
"a street of uniform tall white buildings"
Source: WordNet® (An amazing lexical database of English)
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