The Arabic term for the expiation of a deliberately broken Ramadan fast is kaffarah, also spelled kaffara or kaffārah.
Kaffarah means expiation or atonement. In discussions of Ramadan, it generally refers to the penalty or compensatory religious duty required when a person intentionally violates a fast without a valid excuse. Traditional legal descriptions may include freeing a slave; where that is not possible, fasting for two consecutive months; or, for someone unable to do that, feeding sixty people in need.
Kaffarah should not be confused with qada, which means making up a missed or invalid fast later. Fidyah is another distinct concept: it is generally compensation, such as feeding someone in need, for a person who cannot fast because of a lasting inability or qualifying hardship. Zakat is obligatory almsgiving with its own rules and is not the specific term for fast-breaking expiation.
Details differ among Islamic schools of law, especially over which actions trigger kaffarah and how the remedy is applied. Nevertheless, “kaffarah” is the standard Arabic term for expiation, making it the canonical answer to this wording.