Pronunciation: Astaghfirullaha Rabbi Min Kulli Zam-bew-wa Wa 'a-tu-boo i’laih
Meaning: I ask forgiveness of my sins from Allah who is my Lord and I turn towards him
Virtue: Istighfar (Astaghfirullah) is the gateway of relief and happiness. Whenever you are in distress start reciting it and Insha Allah it will take you out of your anxiety and will put you in a peaceful situation and will give you happiness. Istighfar removes anxiety and duas are answered. Istighfar opens the door of sustenance. Istighfar opens the door of mercy. Istighfar opens the door of knowledge. Istighfar is also gateway of productivity. Istighfar relieves you.
Reference: Hisnul Hasin pg. 260