brand – n. a category of products that are all made by a particular company and all have a particular name

retailer – n. a business selling things directly to customers for their own use

stuck – adj. burdened with something unpleasant

kinetics – n. a branch of science that deals with the effects of forces upon the motions of material bodies or with changes in a physical or chemical system

authentic – adj. being exactly as appears or as claimed

convenience – n. a quality or situation that makes something easy or useful for someone by reducing the amount of work or time required to do something