IPA: /ˈtɔːntər/
KK: /ˈtɔntər/
A person who makes fun of or mocks someone else, often in a teasing or hurtful way.
The taunter laughed at his friend's mistake, making him feel embarrassed.
Taunter → It is formed from "taunt" (from Old French *tant*, meaning to reproach or insult) and "-er" (meaning a person who). A taunter is a person who reproaches or insults others.
Think of someone who is 'insulting' ('taunt') others — the '-er' just means a person. A taunter is someone who insults.