Lustrelessness is a term used to describe a lack of shine or gloss. Some synonyms for this word are dullness, flatness, drabness, and lackluster. Other related words that can be used to describe something that lacks shine or polish include blandness, insipidity, and pallor. When referring specifically to the quality of a person's complexion, words like sallowness, gauntness, or lack of vitality may also be appropriate. Ultimately, the choice of synonym will depend on the context in which it is being used, though all of these words suggest a sense of something that is lacking in vibrancy or luster and may benefit from some extra polish or shine.