Words similar to unchangeable

Example sentences for: unchangeable

How can you use “unchangeable” in a sentence? Here are some example sentences to help you improve your vocabulary:

They said that if obnoxious behaviors such as aggression and clannishness were innate, that would make them "natural" and hence good; or, even if bad, they would be "in the genes" and hence unchangeable, subverting hopes for social reform.
How many people need words like desiccate, didactic, innocuous, immutable , etc., when dry up, instructive, harmless , and unchanging or unchangeable are around?
Genetically influenced behavior is not necessarily good and not necessarily unchangeable.