Amidah

Literally, “standing.” A central prayer of the worship service, often recited privately. A chain of blessings in which the first three and final three are always the same, and the intermediate blessings change based on the day (i.e., Shabbat, weekday, holidays). Also called the Sh’moneh Esreih (literally, “eighteen”) and HaT’fila (literally, “the Prayer”).