IPA: /ˈkɔɪnər/
KK: /ˈkɔɪnər/
A person who creates new words or phrases, or someone who produces coins.
The coiner introduced a new term that quickly became popular in the language.
Coiner → It is formed from "coin" (from Old French *coigne*, meaning a wedge or corner, which later referred to a piece of metal stamped for currency) and "-er" (meaning a person who). A coiner is a person who makes or mints coins.
Think of someone who 'makes' ('-er') a 'piece of metal' ('coin') — that's why a coiner is a person who mints coins.