thimble

Thimble comes from Old English þȳmel, meaning "thumbstall" or "fingerstall," built from þūma ("thumb") plus a suffix used for naming tools or instruments. In modern English it breaks down neatly as thumb + -le.

The word's shape has drifted from Old English þȳmel through Middle English forms like thymbyll and thimel to today's thimble, but its core sense — a protective cap for a finger, especially the thumb — has stayed remarkably steady.

It shares its roots with Dutch duimeling, German Däumling, Low German Dümelke, Saterland Frisian Düümelke, and Scots thummle — all words for the same humble thumb-guard, scattered across the Germanic family tree.