IPA: /ˈkiːbɔːrdɪst/
KK: /ˈkiːbɔːrdɪst/
A person who plays a keyboard instrument, such as a piano or synthesizer, often in a band or musical group.
The keyboardist added beautiful melodies to the band's performance.
Keyboardist → It is formed from "keyboard" (from the combination of "key" (from Old English *cæg*, meaning a device for opening) and "board" (from Old English *bord*, meaning a flat surface)) and "-ist" (meaning a person who practices or is concerned with something). A keyboardist is a person who plays or is skilled in playing the keyboard instrument.
Think of a 'key' that opens up music and a 'board' that serves as the surface for playing — a keyboardist is someone who plays on that musical surface.
No commonly confused words.