IPA: //ˈsɜːrfboʊt//
KK: /ˈsɜrfˌboʊt/
A sturdy boat designed to be used in rough ocean waves, especially for rescue or lifeguard purposes.
The lifeguards used a surfboat to reach swimmers in trouble during the stormy weather.
Surfboat → It is formed from "surf" (from the Old English *syrf*, meaning the foam of the sea) and "boat" (from Old English *bāt*, meaning a small vessel for traveling on water). The word "surfboat" refers to a boat designed to navigate through the surf of the sea.
Think of the 'foam of the sea' ('surf') and a 'small vessel' ('boat') — together, they describe a boat that operates in the waves.