great - ad. very large or more than usual in size or number; very good; important

green - ad. having the color like that made by mixing yellow and blue; having the color like that of growing leaves and grass

grind¹ - v. to reduce to small pieces by crushing²

ground - n. land; the earth's surface; soil

group - n. a number of people or things together; a gathering³ of people working for a common purpose

grow - v. to develop or become bigger; to increase in size or amount

guarantee - v. to promise a result; to promise that something will happen

guard - v. to watch and protect a person, place or thing ("He guards the president."); n. a person or thing that watches or protects ("He is a prison guard.")

guerrilla - n. a person who fights as part of an unofficial army, usually against an official army or police

guide - v. to lead to; to show the way; n. one who shows the way

guilty⁴ - ad. having done something wrong or in violation⁵ of a law; responsible⁶ for a bad action