"pregnant," 1590s, from Latin gravidus "loaded, full, swollen; pregnant with child," from gravis "burdened, heavy," from PIE root *gwere- (1) "heavy." Related: Gravidity. Gravidation "pregnancy" is attested from mid-15c.
Gravenstein
graver
Graves' disease
gravestone
graveyard
gravid
gravigrade
gravimeter
gravitas
gravitate
gravitation