In electric hardware shop

Needed an extension cord and had to ask it from the salesperson. Before my turn came, I checked the dictionary; no, it wasn't there. So I asked what I assumed was right, and indeed, a simple extension cord was brought. I then explained (much with hands) that I needed one with several sockets, after which the saleswoman brought another one and very kindly explained that the adjective for multiple sockets was multiprise! ☺