"Muddy complexioned" is a term used to describe a person's skin that looks dull and lacking in brightness. However, there are many synonyms that can be used to describe this particular condition. One of the most common is "sallow," which refers to skin that has a yellowish or greenish undertone. Another term is "dull," which can describe the lack of color or life in someone's complexion. "Pallid" is a word that can be used to describe someone who looks pale or sickly. Other synonyms include "ashen," "wan," and "unhealthy-looking." These words help to bring clarity and specificity to descriptions of skin tone and complexion.