IPA: /nɒnˈfɔːr.məl/
KK: /nɑnˈfɔrməl/
Describing something that is not formal or official in nature.
The event was nonformal, allowing everyone to dress casually and enjoy themselves.
Nonformal → It is formed from "non-" (meaning not) and "formal" (from Latin "formalis", meaning pertaining to form or structure). The word "nonformal" describes something that is not formal or does not adhere to established forms or conventions.
Think of 'not' ('non-') being combined with 'pertaining to form' ('formal') to remember that 'nonformal' means something that does not follow formal rules or structures.