tuningtool

noun
UK /ˈtjuːnɪŋ tuːl/
US /ˈtuːnɪŋ tuːl/

A tuning tool is a thing you use to make something sound or work just right.

The piano player used a tuning tool to make the strings sound nice.


OTHER MEANINGS

2. A device or software used to adjust an engine or machine so it runs smoothly.

The mechanic grabbed a tuning tool to fix the car's engine.

3. A person or program that helps improve or refine something, like a plan or a piece of writing.

Her editor was a real tuning tool for the story, making every sentence better.

4. A small key or peg used to tighten the strings of an instrument.

He turned the tuning tool on the violin to raise the note.