Lustreless
Part of speech: adjective
Definition: Without luster, dull, not shiny, flat or matte finished.
Dull
Part of speech: adjective
Definition: Lacking the ability to cut easily; not sharp.Boring; not exciting or interesting.Not shiny; having a matte finish or no particular luster.Not bright or intelligent; stupid; slow of understanding.
Part of speech: verb
Definition: To render dull; to remove or blunt an edge or something that was sharp.To soften, moderate or blunt.To lose a sharp edge; to become dull.
Example sentence: The jealous are possessed by a mad devil and a dull spirit at the same time.