IPA: /ˈblʌstərər/
KK: /ˈblʌstərər/
A person who speaks or acts in a loud, aggressive, or boastful way, often to intimidate others.
The blusterer at the meeting tried to dominate the conversation with his loud voice.
Blusterer is formed from "bluster" (originating from Middle English *blustren*, meaning to blow or make a noise) and the suffix "-er" (meaning a person who). A blusterer is a person who makes loud, aggressive noises or boasts.
Think of someone who makes a lot of noise or boasts loudly — that's what a blusterer does.