mueble

a piece of furniture; in the reality show Big Brother, a contestant who does not generate content, who isn't the source of so many comments and who wanders around the house without generating any interest in the viewer; car; A person who is irrelevant, inactive, or unimportant in a situation.; A character who has no development or whose role is negligible, essentially "background furniture."

Inherited from Latin mōbilis. The unexpected diphthongization is due to influence from the verb mover, muevo. Compare the borrowed doublet móvil.