Karpas (כרפס) are the green leafy vegetables used on the seder plate for Passover. Usually, a piece of green parsley is used, though any leafy green can suffice. Some folks even use potatoes.
Karpas serves as a symbol of the wonderful bounty of vegetables and fruits in the springtime harvest. It also represents the period of Jewish flourishing before the period of Egyptian slavery began. This flourishing is meant both metaphorically and literally–in the Torah, we are told that the Israelites numbered 70 individuals when Jacob and his family descended into Egypt. A few generations later, due to a prodigious birthrate, they consisted of hundreds of thousands.
The word karpas itself also alludes to the condition of the Israelites in Egypt, and the hard labor that they suffered when their slavery began. Rearranged, the letters spell parech (פרך), the word for “hard labor,” teaching us that joy and sorrow come hand in hand.
Pronounced: SAY-der, Origin: Hebrew, literally “order”; usually used to describe the ceremonial meal and telling of the Passover story on the first two nights of Passover. (In Israel, Jews have a seder only on the first night of Passover.)