Antonyms of adj alterable

2 senses of alterable

Sense 1
alterable (vs. unalterable) -- (capable of being changed or altered in some characteristic; "alterable clothing"; "alterable conditions of employment")

unalterable (vs. alterable), inalterable -- (not capable of being changed or altered; "unalterable resolve"; "an unalterable ground rule")
        => incurable -- (unalterable in disposition or habits; "an incurable optimist")
        => final, last -- (not to be altered or undone; "the judge's decision is final"; "the arbiter will have the last say")

Sense 2
alterable -- ((of the punishment ordered by a court) capable of being changed to one less severe)

INDIRECT (VIA commutable) -> incommutable -- (not subject to alteration or change)

Similarity of adj alterable

2 senses of alterable

Sense 1
alterable (vs. unalterable) -- (capable of being changed or altered in some characteristic; "alterable clothing"; "alterable conditions of employment")

Sense 2
alterable -- ((of the punishment ordered by a court) capable of being changed to one less severe)
       => commutable (vs. incommutable) -- (subject to alteration or change; "the death sentence was commutable to life imprisonment")