IPA: /ˌsɛrəˈneɪdə/
KK: /sɛrəˈneɪdər/
A person who sings or plays music to someone, usually in a romantic way, often outdoors at night.
The young man became a serenader, singing sweet songs under her window.
Serenader → It is formed from "serenade" (from Italian *serenata*, meaning an evening song) and "-er" (meaning a person who). A serenader is a person who performs an evening song, typically for someone they love.
Think of someone singing a special song in the evening — that's what a serenader does, as they are a person who performs a serenade.