reservetool
nounUK /rɪˈzɜːv tuːl/
US /rɪˈzɜːrv tuːl/
A reserve tool is a special tool you keep ready to use when you need it.
The mechanic kept a reserve tool in his bag in case the first one broke.
RELATED WORDS
OTHER MEANINGS
2. A tool set aside for emergencies or future use.
The team stored a reserve tool in the shed for storm repairs.
3. A secondary instrument used when the main one fails.
When the drill stopped working, she grabbed the reserve tool.
4. A saved digital utility kept for later use in a program.
The app has a reserve tool that opens when the main menu crashes.