indefinite – adj. not clear in meaning or detail

refer to – phrasal verb to have a direct connection or relationship to (something)

modify – v. grammar : to limit or describe the meaning of (a word or group of words)

clause – n. grammar : a part of a sentence that has its own subject and verb

apostrophe – n. the mark ʼ used to show the possessive form of a noun (as in "Lee's book" or "the tree's leaves")

fictional – adj. meaning or involving a story or literature created from one's imagination