Ṣalāh
صلاة
قضاء
Qaḍāʾ
Definition
Making up a missed obligatory act — a ṣalāh missed due to sleep or forgetfulness must be prayed when remembered.
Example
The Prophet ﷺ once slept past Fajr; on waking, the Companions prayed it immediately. A deliberate, prolonged omission is a far graver matter than making it up.