By Chance
1. By Chance, Accidentally, Circumstantially, Unexpectedly : اتفاق سے : (Adverb) Without advance planning.
We met by chance and turned into friends.
They met accidentally.
2. By Chance, By Luck, Haply : قسمت سے - اتفاق سے : (Adverb) By accident.
Betrayed by a word haply overheard.
Accident, Chance Event, Fortuity, Stroke - اتفاق - anything that happens suddenly or by chance without an apparent cause; "winning the lottery was a happy accident".
Advance, Advancement, Forward Motion, Onward Motion, Procession, Progress, Progression - پیش قدمی - the act of moving forward (as toward a goal).