IPA: /ˈfrɛtləs/
KK: /ˈfrɛtləs/
Describing a stringed instrument that has a smooth neck without raised frets, allowing for a continuous range of pitch.
The musician played a beautiful melody on his fretless bass guitar.
Fretless → It is formed from "fret" (from Old French *frete*, meaning a raised ridge on a stringed instrument) and "-less" (meaning without). The word "fretless" describes an instrument that does not have the raised ridges, allowing for a smooth playing surface.
Think of an instrument that is 'without' ('-less') the raised ridges ('fret') that guide finger placement, making it easier to slide between notes.