Main Entry: in·vari·able

Pronunciation: \(ˌ)in-ˈver-ē-ə-bəl\

Function: adjective

Date: 15th century

: not changing or capable of change : constant <an invariable routine>

— in·vari·abil·i·ty \-ˌver-ē-ə-ˈbi-lə-tē\ noun

— invariable noun