Courage, fortitude, or strength.
The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.
Any fundamental support, structure, or infrastructure.
The act of resisting, or the capacity to resist.
An underground organisation engaged in a struggle for liberation from forceful occupation; a resistance movement.
A force that tends to oppose motion.
electrical resistance.