IPA: /ˈklɒɡə/
KK: /ˈklɔɡər/
A person or thing that causes something to become blocked or obstructed.
The plumber removed the clogger from the drain to restore the water flow.
Clogger → The word is formed from "clog" (from Middle English *clogge*, meaning a block or hindrance) and "-er" (meaning a person who). A clogger is a person or thing that causes a blockage or hindrance.
Think of a 'clog' as something that blocks or hinders, and the '-er' indicates a person who does that — so a clogger is someone who causes a blockage.