| faba | bean |  | noun | fab- | faba | faba bean |
| facere | do, make |  | verb | fac-, fact-, -fect-, -fic- (FAC)[154] | facere, factus | affair, affect, affectation, amplify, artifact, artifice, benefactor, benefice, benefit, confection, counterfeit, defeat, defect, disaffect, edifice, effect, effectible, effection, effective, effectivity, effector, effectual, effectuality, effectuate, effectuation, efficacious, efficacity, efficacy, efficiency, efficient, enface, enfacement, facade/façade, face, facet, facette, facial, faciend, facient, facile, facilitate, facilitation, facilitative, facilitator, facilitatory, facility, facinorous, facsimile, fact, faction, factional, factionary, factious, factitious, factor, factorable, factorial, factory, factotum, factual, fake, fashion, feasible, feat, feature, feckless, fiat, forfeit, infect, inofficious, interoffice, laissez-faire, malefaction, manufacture, modify, nonofficial, office, official, officiant, officiary, officiate, officious, olfaction, omnificence, omnificent, parfait, perfect, perfecta, perfectibility, perfectible, perfection, perfective, perfector, pluperfect, prefect, prefectural, prefecture, prequalification, proficiency, proficient, profit, profitability, profitable, profiteer, profiterole, prolific, qualification, quasiperfect, rarefy, refactorable, refashion, refect, refection, refectory, reinfect, remanufacture, resurface, reunification, sacrifice, scientific, semelfactive, suboffice, subprefect, suffice, sufficiency, sufficient, superficial, superficiality, surface, surfeit, surficial, transfection, trifacial, trifecta, uniface, unifacial, unifactorial, unification |
| fallere | false, deceive |  | verb | fall-, fallac-, fals- | fallere, falsus, fallāx, fallācis | default, fail, fallacious, fallacy, fallible, false, falsetto, falsify, falsity, fault |
| falx | sickle |  | noun | falc- | falx, falcis | defalcation, falcate, falciform, falchion, falcon |
| famulus | a close attendant |  | noun | famili- | famulus | familiarity, family |
| fascis | bundle |  | noun | fasc- | fascis | fasciculation, fascism |
| fatuus | foolish, useless |  | adj | fatu- | fatuus | fatuous, infatuation |
| fellāre | suck |  | verb | fell- | fellāre | fellation |
| femur | thigh |  | noun | femor- | femur (genitive femoris) | femoral, femur |
| fendere | strike |  | verb | fend-, fens- | fendere, -fensus | defend, fend, offend, offense |
| fenestra | window |  | noun | fenestr- | fenestra | defenestration |
| ferre | to bear, carry |  | verb | fer- | ferre | aquifer, circumference, confer, conifer, defer, differ, ferry, fertile, infer, Lucifer, offer, prefer, refer, suffer, transfer, vociferous |
| ferrum | iron |  | noun | ferr- | ferrum | ferrous |
| fervēre | boil, glow |  | verb | ferv- | fervēre | ferment, fervent, fervid, fervor, perfervid |
| ferōx | fierce |  | adj | feroc- | ferōx, ferōcis | ferocity |
| fidēs | faith, trust |  | adj | fid-, fis- | fidēs “faith, trust”, from fidere “to trust” | confidante, confidence, confident, diffident, faith, fealty, fidelity, fiduciary, infidel, perfidious, perfidy |
| filius | son |  | noun | fili- | filius | affiliation |
| findere | cleave, split |  | verb | find-, fiss- (FID)[156] | findere, fissus | fission, fissure |
| fingere | to form, shape |  | verb | fig-, fing-, fict- (FIG)[155] | fingere “to touch, handle; devise; fabricate, alter, change” | configure, disfigure, effigy, feign, fiction, fictitious, figment, figurine, nonfiction, transfigure |
| firmus | firm, strong |  | adj | firm- | firmus, firmāre | affirm, confirm, confirmation, firm, firmament, infirm |
| fistula | hollow, tube |  | adj | fistul- | fistula | fistula |
| flaccus | flabby |  | adj | flacc- | flaccus, flaccere | flaccid |
| flectere | bend |  | verb | flect-, flex- | flectere, flexus | circumflex, deflect, flex, flexible, flexile, flexion, flexor, genuflection, inflect, inflection, reflect, reflection, reflex |
| fluere | flow |  | verb | flu-, fluv-, flux- | fluere, fluxus | affluent, confluence, effluent, fluctuate, fluctuation, fluency, fluent, fluid, fluidity, flush, fluvial, flux, influence, influx, superfluous |
| flāre | blow |  | verb | fl-, fla- (FLA)[157] | flāre, flātus | afflatus, conflate, deflate, flatulence, flatus, flavor, flute, inflate, insufflation, soufflé, sufflate |
| flāvus | yellow |  | adj | flav- | flāvus | flavonoid |
| flīgere | strike | | verb | flig-, flict- | flīgere, -flīctus | afflict, conflict, inflict, profligacy, profligate |
| flōs | flower |  | noun | flor- | flōs, flōris | floral, florid |
| focus | hearth |  | verb | foc- | focus | bifocal, focal, focus |
| fodere | dig |  | verb | fod-, foss- | fodere, fossus | fossil |
| foederāre | treaty, agreement, contract, league, pact |  | noun | feder- | foederāre, from foedus (genitive foederis); see also fides “faith” | confederacy, confederation, federal, federate, federation |
| foenum | hay |  | noun | foen- | foenum | Foeniculum |
| folium | leaf |  | noun | foli- | folium | defoliant |
| formīca | ant |  | noun | formic- | formīca | formaldehyde, formic acid |
| fornix | vault |  | noun | fornic- | fornix, fornicis | fornication |
| fortis | strong | | adj | fort- | fortis | force, fort, forte, fortify, fortitude, fortress |
| forāre | bore, drill |  | verb | for- | forāre, forātus | foralite, foramen, foraminifer, perforation |
| fovea | shallow round depression |  | adj | fove- | fovea | fovea |
| frangere | break |  | verb | frag-, frang-, -fring-, fract- | frangere, frāctus | defray, diffract, fractal, fraction, fractious, fracture, fragile, fragment, frangible, fray, infraction, infringe, refract, refractory, refrain |
| fricāre | rub |  | verb | fric-, frict- | fricāre, frictus | dentifrice, friction |
| frāter | brother |  | noun | frater-, fratr- | frāter | fraternal, fraternity |
| frīgere | cold |  | adj | frig- | frīgere | frigid, frigorific |
| frōns | forehead |  | noun | front- | frōns, frontis | confront, frontage, frontal |
| frūx | fruit |  | noun | fruct-, frug- | frūx, frūgis; frū̆ctus | fructose, frugivorous |
| fugere | flee |  | verb | fug-, fugit- | fugere | centrifuge, fugacious, fugitive, refuge |
| fulmen | flash |  | verb | fulmin-, fulgur- | fulmen “lightning flash” | fulminant, fulminate, fulmination, fulgurite |
| fundere | pour |  | verb | fund-, fus- | fundere, fūsus | confound, diffusion, effusion, effusive, found, fusion, infusion, perfusion, profuse, profusion, refund, suffusion, transfusion |
| fundāre | bottom |  | preposition | fund- | fundāre “to found”, from fundus “bottom, foundation” | found, founder, foundation, fund, fundament, fundamental, fundamentalism, profound, profundity |
| fungī | do |  | verb | fung-, funct- | fungī, fūnctus | function, fungibility |
| furca | fork |  | noun | furc- | furca | bifurcation |
| fuscus | dark |  | adj | fusc- | fuscus | fuscous, infuscate, infuscation, obfuscate, obfuscation |
| fārī | say, speak |  | verb | fa-, fa (FA)[153] | fārī, see also fatērī | affable, bifarious, confess, defamation, fable, fame, fascinate, fate, ineffability, infamy, infancy, infant, infantry, nefarious, preface, profess |
| fēlēs | cat |  | noun | fel- | fēlēs, fēlis | Felinae, feline |
| fēlīx | happy, merry |  | adj | felic- | fēlīx, fēlīcis | felicity |
| fēmina | women, female |  | noun | femin- | fēmina | femininity |
| fētēre | stink |  | adj | fet- | fētēre | fetid, fetor |
| fīcus | fig |  | noun | fic- | fīcus | Ficus, fig |
| fīlum | thread |  | noun | fil- | fīlum | defile, filament, file, filigree, fillet, profile |
| fīnis | end |  | verb | fin- | fīnis | affinity, confine, define, final, finale, finance, fine, finish, finite, infinite, refine |
| fīxāre | attach |  | verb | fix- | fīxāre, frequentative of fīgere | affix, fix, fixation, fixture, prefix, suffix, transfix |
| fōns | spring |  | verb | font- | fōns, fontis | font, fontal, fontanelle |
| fōrma | shape | | adj | form- | fōrma | conform, deform, form, formal, formation, formula, formulate, inform, perform, reform, uniform |
| fūmus | smoke |  | noun | fum- | fūmus | fume, fumigation |
| fūr | thief, steal |  | verb | fur-, furt- | fūr (genitive fūris) “thief”, fūrāre | ferret, furtive |
