fretter
nounUK /ˈfrɛtə/
US /ˈfrɛtər/
A person who worries a lot about small things.
My little brother is a fretter who checks his homework three times before school.
OTHER MEANINGS
2. A tool or machine used for cutting or wearing away material, such as a fret saw.
The carpenter picked up the fretter to shape the wooden edge.
3. A person who rubs or wears away a surface by constant touching or movement.
The fretter at the guitar shop smoothed the worn frets on old instruments.
4. A small device or substance that causes gradual erosion or irritation.
The constant drip was a fretter on the stone step, slowly wearing a groove.