invariable

[1]	constant , constant quantity

adj.

[1]	unchanging , changeless , unvarying , invariant , unwavering , constant , steady , stable , regular , fixed , fast , set , rigid , uniform , unfailing , unexceptional
[2]	immutable , unchangeable , unalterable , unmodifiable
[3]	permanent , fixed , enduring , abiding , eternal , unaltered , unvarying , unchanged , unvaried , unaltered , unmodified