IPA: /ɪnˈsʌltər/
KK: /ɪnˈsʌltər/
A person who speaks or acts in a way that is disrespectful or offensive to others.
He was known as an insulter, often making hurtful comments to his friends.
Insulter → It is formed from "in-" (meaning not) and "sultare" (from Latin, meaning to jump or leap). The word refers to someone who leaps into a conversation or situation to offend or insult others.
Think of someone who 'jumps in' ('sultare') to say something 'not nice' ('in-') — that's why an insulter is someone who offends.