adjective \(ˌ)in-ˈver-ē-ə-bəl\

: not changing or capable of change : staying the same : not variable

Full Definition of INVARIABLE

:  not changing or capable of change :  constant <an invariable routine>
in·vari·abil·i·ty \-ˌver-ē-ə-ˈbi-lə-tē\ noun
invariable noun

First Known Use of INVARIABLE

15th century


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