bristle

Rise up as in fear.

“The dog's fur bristled”

Be in a state of movement or action.

“The garden bristled with toddlers”

Have or be thickly covered with or as if with bristles.

React in an offended or angry manner.

“He bristled at her suggestion that he should teach her how to use the program”

A stiff fiber (coarse hair or filament); natural or synthetic.

A stiff hair.