Sail
Old English segel (noun), seglian (verb), of Germanic origin; related to Dutch zeil and German Segel (nouns).
wiktionary
From Middle English saile, sayle, seil, seyl, from Old English seġl, from Proto-West Germanic *segl, from Proto-Germanic *seglą. Cognate with West Frisian seil, Low German Segel, Dutch zeil, German Segel, Swedish segel.
From Middle English sailen, saylen, seilen, seilien, from Old English siġlan(“to sail”), from Proto-West Germanic *siglijan, from *siglijaną. Cognate with West Frisian sile, Low German seilen, Dutch zeilen, German segeln, Swedish segla, Icelandic sigla.
etymonline
sail (n.)
Old English segl "sail, veil, curtain," from Proto-Germanic *seglom (source also of Old Saxon, Swedish segel, Old Norse segl, Old Frisian seil, Dutch zeil, Old High German segal, German Segel), of obscure origin with no known cognates outside Germanic (Irish seol, Welsh hwyl "sail" are Germanic loan-words). In some sources (Klein, OED) referred to PIE root *sek- "to cut," as if meaning "a cut piece of cloth." To take the wind out of (someone's) sails (1888) is to deprive (someone) of the means of progress, especially by sudden and unexpected action, "as by one vessel sailing between the wind and another vessel," ["The Encyclopaedic Dictionary," 1888].
sail (v.)
Old English segilan "travel on water in a ship; equip with a sail," from the same Germanic source as sail (n.); cognate with Old Norse sigla, Middle Dutch seghelen, Dutch zeilen, Middle Low German segelen, German segeln. Meaning "to set out on a sea voyage, leave port" is from c. 1200. Related: Sailed; sailing.