Finally; after a long time.

अंततः

English Usage: "At last, the wait is over."

Hindi Usage: "अंततः, इंतज़ार खत्म हो गया है।"

Used to indicate that something has happened after a delay.

देर से पूरा हुआ

English Usage: "At last, she completed her project."

Hindi Usage: "देर से उसने अपना प्रोजेक्ट पूरा किया।"