1. immutable - Noun
2. immutable - Adjective
3. immutable - Adjective Satellite
Not mutable; not capable or susceptible of change; unchangeable; unalterable.
Source: Webster's dictionarythe view of that time was that all species were immutable, created by God Source: Internet
the immutable laws of nature Source: Internet
Adams likewise agreed with the Florentine that human nature was immutable and driven by passions. Source: Internet
Aquinas, continuing the same tradition, reads the Exodus formula as saying that G-d is ‘true being, that is, being that is eternal, immutable, simple, self-sufficient, and the cause and principal of every creature’. Source: Internet
Although it contained no mention of any possible mechanisms for evolution, this paper foreshadowed the momentous paper he would write three years later. citation The paper shook Charles Lyell's belief that species were immutable. Source: Internet
Arrow of time main Time appears to have a direction—the past lies behind, fixed and immutable, while the future lies ahead and is not necessarily fixed. Source: Internet