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Etymology 1[edit]

From Middle English *fak, fec, fæc (space, compartment), from Old English fæc (space of time, while, division, interval; period of five years, lustrum), from Proto-Germanic *faką (division, department, space), from Proto-Indo-European *pÀǵ- (to fasten, fix). Cognate with West Frisian fek, Dutch vak (section, compartment), German Fach (compartment), Swedish fack (compartment, box, department), Latin pangō (fasten, fix).

Alternative forms[edit]

  • fec (obsolete)


fack (plural facks)

  1. (Britain dialectal) One of the four stomachs of a ruminating animal; rumen; paunch.

Etymology 2[edit]


fack (third-person singular simple present facks, present participle facking, simple past and past participle facked)

  1. (Britain, eye dialect, Cockney) fuck




fack n

  1. a compartment, a box, a slot (one of several)
  2. a trade, a profession, a subject of expertise (seen as a compartment of the larger work life)
  3. a trade union; Contraction of fackförening.


Declension of fack 
Singular Plural
Indefinite Definite Indefinite Definite
Nominative fack facket fack facken
Genitive facks fackets facks fackens

Related terms[edit]

See also[edit]