which runs longitudinally and the weft (older woof) that crosses it. (Weft is an Old English word meaning "that which is woven"; compare leave and left.) One warp thread is called an end and one weft thread is called a pick. The warp threads are held taut and in parallel to each other, typically in a loom. There are many types of looms.

Weaving can be summarized as a repetition of these three actions, also called