Knife edge and Weft

Knife edge noun - The sharp cutting side of the blade of a knife.

Weft and knife edge are semantically related. In some cases you can use "Weft" instead a noun phrase "Knife edge".

Weft noun - The yarn woven across the warp yarn in weaving.

Knife edge and weft are semantically related. Sometimes you can use "Knife edge" instead a noun "Weft".