IPA: /ˈbrɔːdˌkɑːstər/
KK: /ˈbrɔːdˌkæstər/
A person or organization that sends out information, news, or entertainment through radio, television, or the internet.
The broadcaster announced the news live from the studio.
Broadcaster → It is formed from "broad" (from Old English "brād", meaning wide) and "caster" (from Latin "castare", meaning to throw). The word "broadcaster" refers to someone who throws or spreads information widely.
Think of someone who spreads information widely ('broad') — that's what a broadcaster does.