to exist or live

होना

English Usage: I want to be happy.

Hindi Usage: मैं खुश होना चाहता हूँ।

to see an event happen, especially a crime or accident

देखना

English Usage: I witnessed the event unfold before my eyes.

Hindi Usage: मैंने अपनी आँखों के सामने घटना को होते देखा।

a person who sees an event, typically a crime or accident

गवाह

English Usage: The witness gave a detailed account of the incident.

Hindi Usage: गवाह ने घटनाक्रम का विस्तृत वर्णन दिया।