definition of
unalterable

[1] #1 unalterable a. [inalterable] not capable of being changed or altered; "unalterable resolve"; "an unalterable ground rule". wn

[2] #2 unalterable s. of a sentence; that cannot be changed; "an unalterable death sentence". wn

[3] #3 unalterable s. [changeless] remaining the same for indefinitely long times. wn