IPA: /ˈtraʊnsər/
KK: /ˈtraʊnsər/
A person who defeats someone decisively or overwhelmingly, often in a competition or argument.
The trouncer of the debate left no room for doubt about their position.
**Trouncer** → It is formed from "trounce" (from Old French *trouncer*, meaning to defeat or beat) and "-er" (meaning a person who). A trouncer is a person who defeats or beats someone decisively.
Think of someone who 'defeats' ('trounce') others — the '-er' just means a person. A trouncer is someone who decisively beats or defeats.