Word Unit: frater-, frat- (Latin: brother, brotherly, brotherhood)
Word Unit: 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: frequen-, frequent- (Latin: crowded, numerous; repeated, repetition, constant)
Word Unit: friab- (Latin: crumble, fragile, broken into small pieces)
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).

Word Unit: front-, fronto- (Latin: forehead, brow, the forepart of anything; that which projects)
Word Unit: frug-, fruct- (Latin: fruit; from Old French fruit, from Latin fructus, "fruit, produce, profit" from frug-, stem of frui, "to use, to enjoy".)
Word Unit: frustrat-, frustra- (Latin: in vain, in error; to deceive, to disappoint)
Word Unit: frutic-, frut- (Latin: shrub)
Word Unit: fuci-, fuc- (Greek > Latin: rock lichen, seaweed; red paint, rouge)
Word Unit: fuel + (Latin: producing energy; primarily by burning)
Word Unit: Fuel Cells: The Future Source of Fuel Operations? (converting fuel into electricity for power storage)
Word Unit: fug-, -fuge, -fugit (Latin: drive away, flee, fly, run away)
Word Unit: fulg-; fulmi- (Latin: to shine, to flash, to glow, to burn; fulmi-, lightning, thunder forth, denounce; related to fulg-)

Etymologically related "light, shine, glow" word families: ethero-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; pheno-; phospho-; photo-; scinti-, scintill-; splendo-.

Cross references of word groups that are related, directly, indirectly, or partly to: "fire, burn, glow, or ashes": ars-, ard-; -bust; cand-, cend-; caust-, caut-; crema-; ciner-; ether-; flagr-; flam-; focus, foci-; gehenna-; ign-; phleg-; phlog-; pyreto-, -pyrexia; pyr-; spod- (ashes; waste); volcan-.

Word Unit: fulgur- (Latin: lightning; flashing)

Cross references of word groups that are related, directly or indirectly, to: "lightning and/or thunder": astrapo-; bronto-; cerauno-, kerauno-; tonitro-, tonitru-.

Word Unit: fumi-, fum- (Latin: smoke, vapor)

Capno or smoke words. See other related smoke pages at this capno- unit.


Inter-related cross references, directly or indirectly, involving word units dealing with "smoke, smoking": atmido-; capno; Capnomania & Fumimania, Pt. 1; Capnophobia & Fumiphobia, Pt. 1; nebula-; typho-.

Word Unit: funct-, fungi- (Latin: to perform, to execute, to discharge; performance, service, execution)
Word Unit: fundu-, fundus-, fund-, found- + (Latin: bottom, base; and with special reference to financial applications, "piece of land")
Word Unit: funer-, funero-, fun- (Latin: burial; death rites, burial ceremony)

Cross references of word groups that are related, directly or indirectly, to: "bury, burial, cemetery, grave; sleeping place": coimetro-; Epitaphs; sepulc-; sheol; tapho-.