<span>An infinitive is a(n) verb form that usually begins with to and is used as a noun, an adjective, or an adverb </span>
Main entries come first. A main entry consists of the meaning shared by the members of the synonym group, a verbal illustration, and lists of synonyms as well as any related words, phrases, near antonyms, and antonyms.
You basically have to do 1:15
E. An abbreviation for id est, a Latin phrase meaning “that is.” It indicates that an explanation or paraphrase is about to follow: “Many workers expect to put in a forty-hour week — i.e., to work eight hours a day.”