a pale yellow solid substance that is used as food, e.g. for spreading on bread and in baking, in the form of an emulsion of fat globules, air, and water made by churning milk or cream
any of various vegetable oils that remain solid or semisolid at ordinary temperatures
cocoa butter
any of various food spreads made with butter or having the consistency of butter
peanut butter
look as if butter wouldn't melt (in one's mouth)
to have an innocent or meek appearance that may well be deceptive
[Old English butere from a prehistoric West Germanic word which came via Latin butyrum from Greek boutyron, from bous cow + tyros cheese]