Unfurnish is from un- ('reverse, remove') + furnish, from Old French furnir/fournir ('to accomplish, provide'), of Germanic origin, related to frame. Important recorded forms include un- (Old English), furnir (Old French), and *frumjan (Proto-Germanic). Morphologically, the un- element marks negation, reversal, removal, or deprivation, while the base supplies the action, quality, or state being denied or undone. The modern sense continues the older lexical line without requiring a separate origin. In current use it covers to strip of furniture or equipment. The wider family includes derived forms such as unfurnished and related words such as furnish, furniture, and furnished.