To disappear or be forgotten.
गायब हो जाना या भुला दिया जाना
English Usage: When the deadline was extended, my sense of urgency went out of the window.
Hindi Usage: जब समय सीमा बढ़ा दी गई, तो मेरी तत्परता गायब हो गई।
gaayab ho jaana, gayab ho jaana, gayaab ho jaana, gaayab ho jana, gayab ho jana