Answer:
Warp, in the context of wood boards, refers to the distortion or bending of the board due to changes in moisture content. This occurs when the moisture levels differ between the face and the back of the board, causing the fibers to expand or contract unevenly. As a result, the board may become twisted or bulged.
Twisting can also refer to the lengthwise threads in fabric, which are commonly known as the warp threads. These threads run parallel to the selvage edge and are interwoven with the weft threads to form the fabric. The warp threads provide the foundation and stability to the fabric, while the weft threads are inserted perpendicularly to create the pattern or design.
Twisting or bulging of wood boards resulting from changes of moisture content within the fibers. The lengthwise threads in fabric.