bristle
noun
a stiff fiber (coarse hair or filament); natural or synthetic
a stiff hair
verb
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 dog's fur bristled”
“It was a sight to make one's 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”
Source: WordNet 3.1, Princeton University