A Spirit Level Is Named After the Liquid Inside It
Level means flat or even. The spirit level takes its name from the alcohol in the tube, which does not freeze.
Level means flat, even, or at the same height. The builder's *spirit level* is named after its contents: the tube is filled with alcohol rather than water because alcohol has a lower freezing point and a lower viscosity, so the bubble moves freely and the tool works in the cold. The spirit is the liquid, not a metaphor. The word comes from Latin *libra*, a balance or scales — the same word as the zodiac sign and the pound sign £.
- Flat or even. *A level surface.*
- A height or grade. *Sea level.*
- To make flat. *Level the ground.*
- Spirit level — the tool. *Use a spirit level.*
- Latin — *libra*, a balance. *The source.*
Word forms
| Form | Word | Example |
|---|---|---|
| Adjective | level | A level floor. |
| Noun | level | Ground level. |
| Verb | level | Level it. |
| Compound | spirit level | A spirit level. |
| Latin | libra | A balance. |
- Check the shelf is level.Building.
- Water levels rose overnight.Height.
- The tube contains alcohol, not water.The tool.
The libra family
- Level — from *libella*, a little balance
- Libra — the zodiac sign of the scales
- Deliberate — originally to weigh carefully
- Equilibrium — equal balance
- £ — the pound sign, a stylised L for *libra*
Old French *livel*, from Latin *libella*, a little balance or level, a diminutive of *libra*, scales.
Why is it called a spirit level?
Because the tube is filled with alcohol, which resists freezing and lets the bubble move freely in cold weather.
Why is the pound sign an L?
It stands for Latin libra, a unit of weight. The same word gives level and Libra.