instrument-free
adjectiveUK /ˈɪnstrəmənt friː/
US /ˈɪnstrəmənt friː/
Something that works without any tools or machines.
The game is instrument-free, so you only need your hands and your imagination.
OTHER MEANINGS
2. Done without using any musical instruments.
The choir gave an instrument-free performance using only their voices.
3. Able to be measured or done without special measuring tools.
The instrument-free check let the teacher see the answer at a glance.
4. Not needing any scientific or medical equipment.
The instrument-free test was quick and easy for the nurse to do.
5. Free from any formal legal document or written tool.
They made an instrument-free agreement with just a handshake.