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chametz

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Borrowed from Hebrew חָמֵץ (khaméts).

chametz (uncountable)

(Judaism) Food products made from leavened grain flour, which may not be consumed on Passover.
- 2010, Ronald Eisenberg, What the Rabbis Said: 250 Topics from the Talmud, page 219:
  The eating of chametz (leavened products) is explicitly prohibited on Passover (Exod. 12:19–20; 13:3), for the Israelites “took their dough before it was leavened” (Exod. 12:34) and left Egypt in great haste.
- 2011, Irving Greenberg, The Jewish Way: Living the Holidays, page 43:
  A chametz-free total environment is the Passover goal, so any place where chametz was or might have been used during the year is thoroughly checked and cleaned lest any chametz has been left behind.

chametz (not comparable)

(Judaism) Made of chametz.
Synonym: chametz-based

Antonyms: chametz-free, non-chametz
- 1999, Rabbi Doniel Neustadt, “Medicines and Cosmetics for Pesach”, in Kashrut.com‎:
  It is permitted, therefore, to store and use all types of ointments, hand lotions, nail polish or medicated drops (for the ear or nose), etc., even if they contain an active chametz ingredient. […]
(Judaism) Used with or to be used with chametz.
- 2004, “The Quintessential Kashering Primer”, in Jewish Action‎, volume 64 (Spring 2004/5764), number 3‎:
  One of the many preparations one must make for Pesach is kashering (a process to prepare a non-kosher vessel for kosher use or a chametz vessel for use on Pesach). […] All chametz utensils that will be used for Pesach must be thoroughly cleaned. […] Remove the filter covering the drain and put it away for Pesach with the chametz dishes. […] The pots may be chametz pots. […] Where needed, one can use a chametz microwave on Pesach by […]

leavened foods forbidden on Passover