'grammar-independent' originates from the combination of 'grammar' and 'independent', where 'grammar' refers to the set of structural rules governing the composition of clauses, phrases, and words in a language, and 'independent' means not influenced or controlled by others in matters of opinion, conduct, etc.

The term 'grammar-independent' evolved from the need to describe systems or processes that operate without strict adherence to grammatical rules.

Initially, it meant 'not bound by grammar rules', and this meaning has largely remained the same in modern usage.