IPA: /ˈwɪspərər/
KK: /ˈhwɪspərər/
A person who speaks very softly or quietly, often to share secrets or confidential information.
She is known as a horse whisperer because she can communicate with horses in a gentle way.
Whisperer → It is formed from "whisper" (from Old English "hwisprian", meaning to speak softly) and "-er" (meaning a person who). A whisperer is a person who speaks softly or quietly.
Think of someone who 'speaks softly' — that's what a whisperer does.