a stiff fiber (coarse hair or filament); natural or synthetic
a stiff hair
bristle (n.)
be in a state of movement or action; The room abounded with screaming children; The garden bristled with toddlers
rise up as in fear; The dogs fur bristled; It was a sight to make ones hair uprise!
have or be thickly covered with or as if with bristles; bristling leaves'
react in an offended or angry manner; He bristled at her suggestion that he should teach her how to use the program'