1
[ adjective ] not subject or susceptible to change or variation in form or quality or nature

Synonyms

immutable

Examples

"the view of that time was that all species were immutable, created by God"

Related terms

mutable

2
[ adjective ] persistent in occurrence and unvarying in nature

Examples

"maintained a constant temperature" "a constant beat" "principles of unvarying validity" "a steady breeze"

Related terms

invariable

3
[ adjective ] remaining the same for indefinitely long times

Synonyms

unalterable

Related terms

unchangeable

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