IPA: /ʌˈhoʊlstərər/
KK: /ʌˈhoʊlstərər/
A person who covers furniture with fabric and padding to make it comfortable and attractive.
The upholsterer skillfully restored the old chair to its former glory.
Upholsterer → It is formed from "up-" (meaning up or higher) and "holster" (from Middle English *holster*, meaning to cover or furnish). The suffix "-er" indicates a person who performs an action. An upholsterer is a person who covers or furnishes furniture, typically with fabric and padding, thus raising its comfort and aesthetic appeal.
Think of someone who 'covers' ('holster') furniture to make it more comfortable and appealing, and the 'up-' suggests enhancing or improving it.