noun
a concept or idea that is unchangeable
adjective
unable to be changed or altered
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The laws of physics are incommutable and do not change under different circumstances.
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His decision to quit his job was incommutable, no matter how much we tried to convince him otherwise.
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Her loyalty to her friends is incommutable - she always has their back no matter what.
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The bond between the two siblings was incommutable, even though they lived miles apart.