Final answer:
In grammar, the word 'still' is an adverb that modifies verbs, adjectives, or other adverbs. It describes the ongoing nature of an action or state.
Step-by-step explanation:
In grammar, the word 'still' is an adverb. Adverbs modify verbs, adjectives, or other adverbs. They provide additional information about an action or state.
In the given sentence, the word 'still' describes the ongoing nature of the action of waiting. It indicates that the person is continuing to wait.
Learn more about Adverbs