bristle

noun

1
react in an offended or angry manner
He bristled at her suggestion that he should teach her how to use the program
2
rise up as in fear
The dog's fur bristled
It was a sight to make one's hair uprise!
3
have or be thickly covered with or as if with bristles
bristling leaves
4
be in a state of movement or action
The room abounded with screaming children
The garden bristled with toddlers

Also useful for “bristle”:Unscrambler— Rearrange the letters in “bristle”