A substance able to mix with both oil and water, used for cleaning, often in the form of a solid bar (bar soap) or in liquid form (liquid soap), derived from fats or made synthetically.
From Middle English sope, sape, from Old English sāpe, from Proto-West Germanic *saipā, from Proto-Germanic *saipǭ, from Proto-Indo-European *seyb-, *seyp-.
Cognate with Scots saip, sape, Saterland Frisian Seepe, West Frisian sjippe, Dutch zeep, German Low German Seep, German Seife, Danish sæbe, Swedish såpa, Norwegian Bokmål såpe, Norwegian Nynorsk såpe, Faroese sápa, Icelandic sápa. Related also to Old English sāp, Latin sēbum. See seep. Latin sāpō is a borrowing from the Germanic.
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