noun
repellent force; resiliency; elasticity
Refers to the physical property of a material or object to push back, bounce back, or resist deformation. Often used in technical or descriptive contexts.
このマットレスは反発力が強くて、腰にいい。
This mattress has strong resiliency and is good for the lower back.
ゴムの反発力を
A toy that uses the elasticity of rubber.