IPA: /ˌæntiˈfɔːrməlɪst/
KK: /æntiˈfɔrməlɪst/
Opposed to strict rules or formal structures, often in the context of art or literature.
The artist's antiformalist approach allowed for more creativity and expression in her work.
Comparative: more antiformalist
Superlative: most antiformalist
Antiformalist is formed from "anti-" (meaning against) and "formal" (from Latin "formalis", meaning pertaining to form) and "-ist" (meaning one who practices or advocates). The word describes someone who is against formalism or strict adherence to established forms or conventions.
Think of someone who is 'against' ('anti-') strict 'forms' ('formal') — that's why antiformalist refers to a person who opposes formalism.