bristle (Noun) — A stiff fibre (coarse hair or filament); natural or synthetic.
bristle (Noun) — A stiff hair.
bristle (Verb) — Be in a state of movement or action. ex. "The garden bristled with toddlers"
bristle (Verb) — Rise up as in fear. ex. "The dog's fur bristled"
bristle (Verb) — Have or be thickly covered with or as if with bristles. ex. "bristling leaves"
bristle (Verb) — React in an offended or angry manner. ex. "He bristled at her suggestion that he should teach her how to use the program"