Downtrodden (adjective) : दलित
Meaning: oppressed or treated badly by people in power.
Synonyms: distressed, exploited, needy
Antonyms: rich, wealthy, happy
Usage: In the first place, she was a poor, downtrodden woman; in the second, she was their broker.

Epidemic (noun): महामारी
Meaning: a widespread occurrence of an infectious disease in a community at a particular time.
Synonyms: contagious, endemic, infectious
Antonyms: limited
Usage: Then, too, when our artist friend was with us we were in the grasp of an epidemic of cholera.

Troop (noun) : दल
Meaning: soldiers or armed forces.
Synonyms: army, contingent, crew, delegation
Antonyms: individual, one
Usage: Gen. Marion had rallied a troop there, and checked the pursuit.

Dominion (noun): अधिराज्य
Meaning: sovereignty or control.
Synonyms: bailiwick, command, commission
Antonyms: submission, subordination
Usage: John had been under her dominion, and proceeded to persuade her.

Opacity (noun): अस्पष्टता
Meaning: the quality of lacking transparency or translucence.
Synonyms: darkness, murkiness, obscurity
Usage: The cause of this opacity is generally quick boiling while the meat is in.

Isolation (noun) : अलगाव
Meaning: the process or fact of isolating or being isolated.
Synonyms: confine, detach, disconnect
Antonyms: attach, combine, connect
Usage: Like Hermione, he wished to isolate Vere, to preserve her as she was in character.

Finality (noun) : अन्तिम स्थिति
Meaning: the fact or impression of being final and irreversible.
Synonyms: certitude, completeness, decisiveness
Antonyms: fraction, incompleteness
Usage: “The stolen goods were found in her locker,” Gilder declared in a tone of finality.

Revamp (verb) : सुधार
Meaning: give new and improved form, structure, or appearance to.
Synonyms: clean, overhaul, refurbish
Antonyms: break, damage, destroy
Usage: She would learn how to keep her own bank-account and revamp her arithmetic.

Antithesis (noun): विलोम
Meaning: a person or thing that is the direct opposite of someone or something else.
Synonyms: antipode, contra, contradictory
Antonyms: same, similarity
Usage: He was only misled by his love of antithesis into a hasty and illogical remark.

Pandemic (adjective): महामारी
Meaning: (of a disease) prevalent over a whole country or the world.
Synonyms: broad, catholic, common
Antonyms: abnormal, exclusive, extraordinary
Usage: Uranian Aphrodite was distinguished from her Pandemic sister by chastened lust-repelling loveliness.