Webster's Revised Unabridged Dictionary · 1913

Woof

Woof (wof) , noun

[Old English oof, Anglo-Saxon ōwef, ōweb, āweb; on, an, on + wef, web, from wefan to weave. The initial w is due to the influence of English weave. See On, Weave, and compare Abb.]

1.
The threads that cross the warp in a woven fabric; the weft; the filling; the thread usually carried by the shuttle in weaving.
2.
Texture; cloth; as, a pall of softest woof. — Pope