to join or attach something to something else

जोड़ना

English Usage: She added sugar to her tea.

Hindi Usage: उसने अपनी चाय में चीनी जोड़ी।

indicating the agent performing an action

द्वारा

English Usage: The book was written by an acclaimed author.

Hindi Usage: पुस्तक एक प्रसिद्ध लेखक द्वारा लिखी गई थी।

something that is added; an addition

जोड़

English Usage: The new addition to the house is spacious.

Hindi Usage: घर के नए जोड़ में जगह बहुत है।