foin /ˈfɔɪn/
  Foin, v. i.  To thrust with a sword or spear; to lunge. [Obs.]
      He stroke, he soused, he foynd, he hewed, he lashed.   --Spenser.
  They lash, they foin, they pass, they strive to bore
  Their corselets, and the thinnest parts explore.   --Dryden.
  Foin, v. t. To prick; to st?ng. [Obs.]
  Foin, n. A pass in fencing; a lunge. [Obs.]
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  Foin n.
  1. Zool. The beech marten (Mustela foina). See Marten.
  2. A kind of fur, black at the top on a whitish ground, taken from the ferret or weasel of the same name.[Obs.]
      He came to the stake in a fair black gown furred and faced with foins.   --Fuller.