IPA: /ˈrævədʒər/
KK: /ˈrævədʒər/
A person or thing that causes great destruction or damage.
The ravager left the town in ruins after the storm.
Ravager → It is formed from "ravage" (from Old French *ravager*, meaning to plunder or devastate) and "-er" (meaning a person who). A ravager is a person who plunders or causes destruction.
Think of someone who 'plunders' ('ravage') — the '-er' just means a person. A ravager is someone who causes destruction.