Final answer:
The -ly suffix usually indicates that a word is an adverb.
Step-by-step explanation:
The -ly suffix usually indicates that a word is an adverb. Adverbs modify verbs, adjectives, and other adverbs. They often answer questions like how, when, where, or to what extent. For example, in the sentence 'She ran quickly,' the word 'quickly' is an adverb that describes how she ran.
Learn more about Adverbs