nerve

Any of the cordlike bundles of fibers made up of neurons through which sensory stimuli and motor impulses pass between the brain or other parts of the central nervous system and the eyes, glands, muscles, and other parts of the body. Nerves form a network of pathways for conducting information throughout the body.

The sensitive tissue in the pulp of a tooth.

A sore point or sensitive subject.

Courage and control under pressure.

Fortitude; stamina.