IPA: //ˈroʊd.stər//
KK: /ˈroʊdstə/
A type of car that has no roof and usually has two seats, designed for driving on roads.
He drove his new roadster along the coastal highway.
Roadster → The word is formed from "road" (from Old English *rād*, meaning a journey or a way) and "-ster" (a suffix used to denote a person or thing associated with a specific activity). A roadster is a vehicle designed for traveling on roads, emphasizing its purpose for journeys.
Think of a 'road' as a path for journeys, and '-ster' indicating something related to that journey — a roadster is a vehicle made for traveling on roads.