One

Solo

अकेला

English Usage: He decided to go on a solo trip.

Hindi Usage: उसने अकेले यात्रा करने का फैसला किया।

Unique

एक

English Usage: She was the only one in the room.

Hindi Usage: वह कमरे में एकमात्र थी।

Single

Individual

व्यक्तिगत

English Usage: Each individual has unique talents.

Hindi Usage: प्रत्येक व्यक्ति के पास अद्वितीय प्रतिभाएं हैं।

One (as in "one's own")

Someone

कोई

English Usage: Someone will answer your questions.

Hindi Usage: कोई आपके सवालों का जवाब देगा।