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See also: YF and yF


Etymology 1[edit]



  1. Obsolete form of if.

Etymology 2[edit]



  1. (knitting) Initialism of yarn forward.
    • 1997, Jo Sharp, Knitted sweater style: inspirations in color, page 62:
      Row 3. P1, yb, sl1 purlwise, yf, pbf, p1.


Middle English[edit]



  1. if
    • 1474, Caxton, Game and Playe of the Chesse[1]:
      And attorneyes of court to the comyn peple of y'e royame as well in the spirituell lawe as in the temporall/ how torne they the lawe and statutes at their pleasir/ how ete they the peple/ how enpouere they the comynte/ I suppose that in alle Cristendom ar not so many pletars attorneys and men of the lawe as ben in englond onely/ for yf they were nombrid all that lange to the courtes of the channcery kinges benche. comyn place. cheker. ressayt and helle And the bagge berars of the same/ hit shold amounte to a grete multitude And how alle thyse lyue & of whome. yf hit shold be vttrid & told/ hit shold not be beleuyd.
      (please add an English translation of this quotation)
    • 1545, Desiderius Erasmus, A Very Pleasaunt & Fruitful Diologe Called the Epicure[2]:
      Blessed are you, yf you supporte suche as preache the Gospell.
      (please add an English translation of this quotation)
    • 1591, Edmund Spenser, The Poetical Works of Edmund Spenser, Volume 5[3]:
      Ne do I wish (for wishing were but vaine) To be acquit fro my continual smart, But ioy her thrall for ever to remayne, And yield for pledge my poor and captyved hart, The which, that it from her may never start, Let her, yf please her, bynd with adamant chayne, And from all wandring loves, which mote pervart His safe assurance, strongly it restrayne.
      (please add an English translation of this quotation)





  1. (literary) third-person singular present/future of yfed
  2. (literary) second-person singular imperative of yfed


Welsh mutation
radical soft nasal h-prothesis
yf unchanged unchanged hyf
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.