IPA: /ˈhɑrdˌtɑp/
KK: /ˈhɑrdˌtɑp/
A type of car or boat that has a solid, fixed roof instead of a soft top, often designed to look like a convertible.
The new model features a sleek hardtop that enhances its sporty appearance.
Hardtop → The word is formed from "hard" (from Old English "heard", meaning solid or firm) and "top" (from Old English "top", meaning the highest part or surface). Together, these parts describe a solid or firm covering for the top of a vehicle.
Think of something that is 'solid' ('hard') on the 'top' of a vehicle — that's what a hardtop is.
No commonly confused words.