upholster: [19] Upholster has no etymological connection with holsters. It is a back-formation from upholsterer [17], which itself was derived from an earlier but now obsolete upholster ‘person who deals in or repairs small articles’. This was an agent noun formed from the verb uphold [13] (a compound of up and hold), in the now defunct sense ‘repair’. => hold[upholster etymology, upholster origin, 英语词源]