The word "mua" does not appear to align with any recognized English vocabulary. However, if you meant "mood," it refers to a temporary state of mind or feeling.
The word "mood" originates from the Old English "mōd,” which means "heart, spirit, courage, pride” and derives from the Proto-Germanic "mōdaz," related to the concept of mental state and feelings.
If you were referring to another word, please clarify, and I will assist you accordingly.