thimble
nounUK /ˈθɪm.bəl/
US /ˈθɪm.bəl/
A small cap you wear on your finger to keep a needle from poking you.
She put on her thimble before sewing the button.
OTHER MEANINGS
2. A metal ring with a groove used to hold a rope in place.
The sailor secured the line with a thimble.
3. A small measure of liquor, about an ounce.
He poured a thimble of whiskey.
4. A thimble-shaped piece of metal used in machinery.
The mechanic replaced the worn thimble in the pump.