fret

Universal Words verb, noun verb (-tt-) (especially BrE) ~ (about / over sth) to be worried or unhappy and not able to relax: [V] Fretting about it won't help. * Her baby starts to fret as soon as she goes out of the room. [also VN, Vthat] noun one of the bars on the long thin part of a guitar, etc. Frets show you where to press the strings with your fingers to produce particular sounds: a rock guitar with a 24 fret neck