| Term | Definition |
| gainsay | deny |
| gait | manner of walking or running; speed |
| galaxy | large isolated system of stars such as the Milky Way; collection of brilliant personalities |
| gale | windstorm; gust of wind; emotional outburst ( laughter, tears) |
| gall (n) | bitterness; nerve |
| gall (v) | annoy; chafe |
| galleon | large sailing ship |
| galvanize | stimulate by shock; stir up; revitalize |
| gambit | opening in chess in which a piece is sacrificed |
| gambol | romp; skip about; leap playfully |
| gamely | in a spirited manner; with courage |
| gamut | entire range |
| gape | open widely |
| garbled | mixed up; jumbled; distorted |
| gargantuan | huge; enormous |
| gargoyle | waterspout carved in grotesque figures on a building |
| garish | overbright in color; gaudy |
| garner | gather; store up |
| garnish | decorate |
| garrulous | loquacious; word; talkative |
| gastronomy | science of preparing and serving good food |
| gauche | lacking sensitivity and skill in dealing with others; clumsy; coarse and uncouth |
| gaudy | flashy; showy |
| gaunt | lean and angular; barren |
| gavel | hammerlike tool; mallet |
| gawk | stare foolishly; look in open-mouthed awe |
| gazette | official periodical publication |
| genealogy | record of descent; lineage |
| generality | vague statement |
| generate | cause; produce; create |
| generic | characteristic of an entire class of species |
| genesis | beginning; origin |
| geniality | cheerfulness; kindliness; sympathy |
| genre | particular variety of art or literature |
| genteel | well-bred; elegant |
| gentility | those of gentile birth; refinement |
| gentry | people of standing; class of people just below nibility |
| genuflect | bend the knee as in worship |
| germane | pertinent; bearing upon the case at hand; related to the matter at hand |
| germinal | pertaining to a germ; creative |
| germinate | cause to sprout; sprout |
| gerontocracy | government ruled by old people |
| gerrymander | change voting districts in line in order to favor a political party |
| gestate | evolve; as in prenatal growth |
| gesticulation | motion; gesture |
| ghastly | horrible |
| gibberish | nonsense; babbling |
| gibe | mock |
| giddy | light-hearted; dizzy |
| gingerly | very carefully |
| girth | distance around something; circumference |
| gist | the central idea; essence |
| glacial | like glacier; extremely cold |
| glaring | highly conspicuous; harshly bright |
| glaze | cover with a thin and shiny surface |
| glean | gather leavings |
| glib | fluent; facile; slick |
| glimmer | shine erratically; twinkle |
| gloat | express evil satisfaction; view malevolently |
| gloss over | explain away |
| glossary | brief explanation of word used in the text |
| glossy | smooth and shining |
| glower | To look or stare angrily or sullenly; scowl |
| glut | overstock; fill to excess |
| glutinous | sticky; viscous |
| glutton | someone who eats too much |
| gnarled | twisted and knotty |
| gnome | dwarf; underground spirit |
| goad | urge on |
| gorge (n) | narrow canyon; steep rocky cleft |
| gorge (v) | stuff oneself |
| gory | bloody |
| gossamer | sheer; like cobwebs |