gastr/o stomach gastric – pertaining to the stomach; gastronomy – serving the stomach by providing good food; gastritis – inflammation of the stomach.

gen/o/e/genesis birth, production, formation, kind genealogy – the study of the history of a family; generation – all the people born at approximately the same time; genetic -relating to heredity encoded in the genes.

geo earth, soil, global geography – study of the earth’s surface; geology – study of the structure of the earth; geoponics – soil based agriculture.

ger old age geriatrics – medicine pertaining to the elderly; gerontocracy – the rule of the elders; gerontology – the science of aging.

giga a billion gigabyte – unit of computer storage space; gigahertz – unit of frequency (one billion Hz/sec); gigawatt unit of electric power (one billion watts).

gon angle decagon – a polygon with 10 angles; diagonal – a slanting line running across a space; octagon – a geometrical figure with 8 angles.

gram letter, written diagram – a simple drawing; grammar – rules of how to write words in sentences; telegram – a message sent by telegraph.

graph/y writing, recording, written Graphology – the study of handwritings; autograph – written with one’s own hand; seismograph – a machine noting strength and duration of earthquakes.

grat pleasing gratify – to please someone; grateful – feeling thankful; gratuity – a tip, token of appreciation.

gyn/o/e woman, female gynecology – the science of female reproductive health; gynephobia – fear of women; gynecoid – resembling a woman.

gress, grad/e/i to step, to go digression – a departure from the main issue, subject, etc.; progress – movement forward or onward; gradual – step by step.