A prayer performed between ‘Ishā’ prayer and the break of dawn to conclude the night prayer.
Tījāniyyah
"Tahajjud": getting up from sleep. It is originally derived from "hujūd", which means sleep in the night.
"Tarāweih" (sing. tarwīhah): rest, taking rest, a prayer which contains rest. It is derived from "rawh", which means expansion and wideness. This prayer is called "Tarāweih" because the people rest after every four rak‘ahs.
"Shaf‘": even number. It is any number that can be equally divided by two, like two and ten. Opposite: "witr" (single, odd). Original meaning: joining two things. Other meanings: increase, association.
Filling the night, or most of it, with acts of worship such as the prayer, remembrance of Allah, reciting the Qur’an, and so on.
The time between sunset and the break of the true dawn.
Performing the voluntary prayer after the "Tarāweeh" (voluntary prayer performed after the ‘Ishā’ in Ramadan).