Source : Webster's Revised Unabridged Dictionary (1913)

Sennit \Sen"nit\, n. [Seven + knit.]
   1. (Naut.) A braided cord or fabric formed by plaiting
      together rope yarns or other small stuff.

   2. Plaited straw or palm leaves for making hats.

Source : WordNet®

sennit
     n : flat braided cordage that is used on ships