Qere and Ketiv
Qere and Ketiv (from the Aramaic qere or q're, קְרֵי, "[what is] read"; ketiv, or ketib, kethib, kethibh, kethiv, כְּתִיב, "[what is] written") refers to a system for marking differences between what is written in the consonantal text of the Hebrew Bible, as preserved by scribal tradition, and what is read. In such situations, the qere is the technical orthographic device used to indicate the pronunciation of the words in the Masoretic Text of the Hebrew language scriptures (Tanakh), while the ketiv indicates their written form, as inherited from tradition.