The term 'darkened wood' can be described as wood that has been STAINED. Staining is a process in which a colorant is applied to the surface of the wood, usually to enhance its appearance or to protect it from the elements. Staining can also be used to create a unique look, such as a distressed or aged effect. The staining process involves applying a pigment or dye to the wood, which is then sealed with a protective finish. The result is a darker, richer color that can last for years.