Is the word in bold an adjective or an adverb?Hares are amazingly fast; using their long hind legs, they can reach speeds of up to thirty-five miles per hour.

The word "amazingly" in the sentence is an adverb. This is because it is used to modify the adjective "fast", describing how fast the hares are. Adverbs can modify verbs, adjectives, and other adverbs. In this case, "amazingly" is modifying "fast", telling us to what extent the hares are fast.

The word "amazingly" in the sentence is an adverb. Here's the step-by-step analysis:

1. Identify the word in bold: The word in bold is "amazingly".

2. Understand the function of the word: The word "amazingly" is used to describe how fast the hares are. It is modifying the adjective "fast", telling us to what extent the hares are fast.

3. Determine the part of speech: Words that modify adjectives or verbs are typically adverbs. Since "amazingly" is modifying the adjective "fast", it is an adverb.

So, "amazingly" is an adverb in this sentence.