Antonyms of adj permutable

1 sense of permutable

Sense 1
transposable, permutable -- (capable of changing sequence)

INDIRECT (VIA exchangeable) -> unexchangeable -- (not suitable to be exchanged)

Similarity of adj permutable

1 sense of permutable

Sense 1
transposable, permutable -- (capable of changing sequence)
       => exchangeable (vs. unexchangeable) -- (suitable to be exchanged)