Answer:
1. The grass has begun to bristle from lack of moisture. Verb
2. Clean each bristle carefully before you brush your teeth. Noun
3. The dog will bristle if it hears an intruder. Verb
4. I bristled at the thought that my little brother had snooped in my room. Verb
Step-by-step explanation:
Verb is an action word, or a doing word. It is used to indicate an activity. A noun is the name of an animal, place, or thing. Bristle can be a noun or a verb as indicated in the sentences above.
1. In the first sentence, bristle is a verb because it indicates an action performed by the grass.
2. The second sentence shows that bristle is a thing- a short stiff hair.
3. The word bristle is an act of showing anger by the dog.
4. The word bristle in this sentence is the act of showing anger at the thought of the subject's brother snooping.