What does Safa mean?
Safa (صفا / صفاء, safa') derives from the root s-f-w and means 'purity, clarity, serenity'. It is also the name of Al-Safa, one of the two hills in Mecca (with Al-Marwah) between which pilgrims walk during the Hajj and Umrah.
What does Dua mean?
Dua (دعاء, du'a') means 'prayer, supplication, invocation', from the Arabic root d-'-w. In Islamic practice du'a refers specifically to personal prayer or calling upon God.