IPA: /dɪˈlaɪtə/
KK: /dɪˈlaɪtər/
A person or thing that brings joy or pleasure to others.
The clown was a true delighter, making everyone laugh and smile.
Delighter → It is formed from "delight" (from Old French *delit*, meaning pleasure or joy) and "-er" (meaning a person who). A delighter is a person who brings pleasure or joy.
Think of someone who brings 'pleasure' ('delight') — the '-er' just means a person. A delighter is someone who brings joy.