ムンムンTop 45000MeaningsAdverbAdverb taking とSuru verb1. stuffy; steamy; sultry (Onomatopoeia)Other readingsむんむんExamples1その部屋へやは参さん加か者しゃの熱ねっ気きでムンムンしていた。The air in that room was thick with the enthusiasm of the participants.