IPA: //nɒnˈdʒʌdʒ.mɛn.təl//
KK: /nɑnˈdʒʌdʒmɛntl/
Not forming opinions or making judgments about others, especially in a moral or ethical context.
She listened to her friend in a nonjudgmental way, allowing him to express his feelings freely.
Nonjudgmental → It is formed from "non-" (meaning not) and "judgmental" (from "judge" which comes from Old French *juger*, meaning to assess or form an opinion). The word "nonjudgmental" means not forming an opinion or assessment about someone or something.
Think of 'not' ('non-') forming an 'opinion' ('judgmental') about others — that's why nonjudgmental means not judging.