Word Unit:
forbi-, forb- (Greek: phorbe, fodder, from pherbein, to graze; by extension: fodder, food; any herb other than grass, a broadleaf herb; a weed)
Word Unit:
foren-, fore- (Latin: forensis of a forum, place of assembly; public, public speaking; foras, foranus, outside, residing outside, out of doors)
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form-, -form, forma-, format- (Latin: shape, structure, figure, outer appearance, composition, to compose; visual appearance; spacial arrangement; to develop or to acquire; to produce)
Word Unit:
formic-, form-, -formic (Latin: ant, ants)
Another word unit that is related directly to "ants": myrmeco-.
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fortu-, fortun- (Latin: chance, fate, luck)
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foss-, fossili-, fossil-, fossor- + (Latin: to dig, digging; dug out, dug up from beneath the surface; ditch, trench)
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Fracking, Hydro Fracking, Hydraulic Fracturing Content Entries (Hydraulic fracturing, or fracking, is the practice of extracting natural gas from underground shale deposits by injecting high-pressure streams of water, sand, and chemicals)
Word Unit:
frag-, frang-, fract-, fring- (Latin: break, breaking; broken; cracked)
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fren- + (Latin: rein, bridle, a bit (as in a horses mouth); by extension, a medical term for a connecting fold of membrane in the body)
Word Unit:
frica-, frict-, -frice + (Latin: a rubbing, to rub)
Cross references of word families that are related directly, or indirectly, to: "rub, rubbing; wear away; wipe": bruxo, brux-; terg-; tribo-; -tripsy; trit-.
Word Unit:
frigo-, frig- (Latin: cold, frost; freezing)
Cross references of word families that are related directly or indirectly to "winter, freezing, frost, and/or cold": algid- (cold, chilly); cheimo-, chimo- (winter, cold); crymo-, krymo- (cold, chill, frost); cryo-, kryo-; (cold, freezing); gel-, gelati- (freeze, frost, congeal); hiber- (winter, wintry); pago- (cold, freezing); psychro- (cold); rhigo- (cold, frost; shiver).