IPA: /ˈmoʊtəˌboʊtə/
KK: /ˈmoʊtərˌboʊtər/
A person who drives or operates a motorboat.
The motorboater skillfully navigated through the waves.
Motorboater → It is formed from "motor" (from Latin "movere", meaning to move) and "boater" (from "boat" which comes from Old English "bāt", meaning a small vessel). The word "motorboater" refers to a person who operates a boat powered by a motor, emphasizing the movement aspect of the vessel.
Think of 'moving' ('movere') with a 'boat' ('bāt') — that's why a motorboater is someone who moves a boat using a motor.
No commonly confused words.