seine n.

"drag-net, kind of net used in fishing," Middle English seine, from Old English segne "drag-net," from West Germanic *sagina (source also of Old Saxon and Old High German segina), a borrowing of Latin sagena (source also of French seine, Old French saine, 12c., which contributed to the form of the English word), from Greek sagēnē "a fishing net," also "a hunting net," a word of unknown origin.