snithy

from The Collaborative International Dictionary of English v.0.48

Snithe \Snithe\, Snithy \Snith"y\, a. [AS. sn[imac][eth]an to
   cut. See {Snathe}.]
   Sharp; piercing; cutting; -- applied to the wind. [Prov.
   Eng.]
   [1913 Webster]