invariable

The word 'invariable' is built from Latin components. The core is the root vari-, derived from the Latin verb variare meaning "to change, to make different". This root is prefixed with the Latin negative particle in- to form the concept of "not changing". The suffix -able, from Latin -abilis, was then added to create an adjective meaning "capable of not changing". The term entered English via Middle French, solidifying its modern meaning of something that is constant and never alters.

Structure: in (not) + vari (change) + able (capable of) - in: Latin origin, a prefix meaning "not". - vari: Latin origin, from the root var- meaning "to change, to vary". - able: Latin/French origin, a suffix meaning "capable of, tending to".