The Collaborative International Dictionary of English v.0.48:

Thrid \Thrid\, v. t. [imp. & p. p. Thridded; p. pr. & vb. n.
   Thridding.] [A variant of thread.]
   1. To pass through in the manner of a thread or a needle; to
      make or find a course through; to thread.
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            Some thrid the mazy ringlets of her hair. --Pope.
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            And now he thrids the bramble bush.   --J. R. Drake.
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            I began
            To thrid the musky-circled mazes.     --Tennyson.
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   2. To make or effect (a way or course) through something; as,
      to thrid one's way through a wood.
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