Identify the part of speech for the word in parentheses in the sentence: "Jack is a (terrible) singer."

In the sentence "Jack is a (terrible) singer," the word "terrible" functions as an adjective. Adjectives are words that describe or modify nouns, providing more information about the noun's characteristics. In this case, "terrible" describes the noun "singer," indicating the quality of Jack's singing ability. The presence of an article ("a") before "singer" is also a clue that "singer" is a noun, but the focus is specifically on how "terrible" interacts with it to convey meaning. Recognizing that adjectives serve to give us more details about nouns helps clarify the role "terrible" plays in the sentence.