bristle
Bristle (noun) means a stiff, coarse hair on an animal or plant, or one of the stiff filaments in a brush. Example: “The boar's bristles stood up along its back.”
How to use bristle
Learner’s notesIn plain EnglishA stiff hair, or to react defensively.
It is used in both everyday and written English.
Fill the gap
Can you complete this real example?
The boar's _____ stood up along its back.
Etymology
The word comes from Middle English, which took it from Old English. It is traced back through Germanic to a diminutive of an older word for bristle.