IPA: /ˈmɛnʧənər/
KK: /ˈmɛnʧənər/
A person who refers to something in a brief or casual way during a conversation or discussion.
During the meeting, the mentioner brought up an important point that everyone should consider.
Mentioner → It is formed from "mention" (from Latin "mentio", meaning a calling to mind or reference) and "-er" (meaning a person who). The word "mentioner" refers to a person who makes a reference to something.
Think of someone who makes a 'reference' ('mention') to something — the '-er' just means a person. A mentioner is someone who brings something to mind.