2024年11月21日 · Borrowed from Arabic كَافِر (kāfir, “denier, unbeliever”). Doublet of kaffir. kafir (countable and uncountable, plural kuffar or kafirs) (Islam, countable, offensive, religious slur, politics) A disbeliever, a denier: someone who rejects or disbelieves in Allah or the tenets of Islam; or more broadly any non-Muslim.