Hoops Once Held Every Barrel Together
A hoop is a rigid circular band. Before steel drums, coopers shaped them by hand for every cask.
A hoop is a rigid circular band of metal or wood. Barrels hold together by geometry rather than glue: tapered staves are forced into a bulging shape and driven hoops squeeze them tighter as they are hammered down. Nothing fastens the staves to each other — compression alone makes a cask watertight. *Jump through hoops* comes from circus animals, and *hoopla* was originally a fairground game of throwing rings.
- A circular band. *A barrel hoop.*
- A toy ring. *A hula hoop.*
- A basketball ring. *Shooting hoops.*
- Jump through hoops — meet needless demands. *Jump through hoops.*
- Old English — *hop*. *The source.*
Word forms
| Form | Word | Example |
|---|---|---|
| Noun | hoop | A hoop. |
| Plural | hoops | Hoops. |
| Verb | hoop | Hooping. |
| Related | hoopla | Hoopla. |
| Old English | hop | A hoop. |
- The hoops rusted through.Barrel.
- They were shooting hoops.Basketball.
- We had to jump through hoops.Idiom.
How a barrel stays together
- Staves are tapered at both ends and widest in the middle
- Forcing them into a curve puts every stave under compression
- Driven hoops tighten the whole assembly
- Nothing glues the staves to one another
- Wetting the wood swells it and seals the joints
Old English *hop*, of Germanic origin, related to Dutch *hoep*.
How does a barrel hold liquid without glue?
The staves are forced into a curve and squeezed by driven hoops. Compression and swelling wood seal the joints.
Where does jump through hoops come from?
From circus animals trained to leap through hoops on command, hence performing pointless tasks to satisfy someone.