sparetool
nounUK /ˈspɛətuːl/
US /ˈspɛrˌtul/
A spare tool is an extra tool you keep in case another one breaks or gets lost.
He packed a sparetool in his bag before the bike trip.
RELATED WORDS
OTHER MEANINGS
2. A tool kept unused as a replacement for a worn-out one.
The mechanic kept a sparetool on the shelf for emergencies.
3. A person who is available to help when others cannot.
She acted as a sparetool during the busy weekend shift.
4. A secondary piece of software used when the main program fails.
The developer ran a sparetool to recover the corrupted file.