onlooker
Definition
A person who watches an event or situation but does not take part in it.
हिन्दी एक व्यक्ति जो किसी घटना या स्थिति को देखता है लेकिन उसमें भाग नहीं लेता।
Example
"An onlooker called the police when the fight broke out on the street."