sail

From Middle English saile, sayle, seil, from Old English seġl, from Proto-West Germanic *segl, from Proto-Germanic *seglą.

The related verb form came from Old English seġlan or siġlan, meaning 'to sail,' itself from Proto-West Germanic *siglijan — so the noun for the cloth and the verb for the motion have grown up side by side from the very start.

It's cognate with Dutch zeil, German Segel, Danish sejl, and Swedish segel — all names for the same broad sheet catching wind across Germanic languages. The verb side has its own cousins too, like German segeln and Icelandic sigla.