adjective / noun / verb
spare
SPAIR/sper/
Available beyond immediate requirements.
The vehicle carries a spare wheel on its rear door.

Etymology
Old English sparian included “use sparingly.” The adjective spare derives from, or shares a root with, the verb: something held back from use remains available when an extra need arises.
In context
asked some of his animator friends to help out in their spare time as well
More examples
- I keep a spare in case this key breaks.
- Can you spare a few minutes to help me?
- We spare no expense on safety equipment.
Forms
spare · spares · spared · sparing