Select the option that can be used as a one-word substitute for the given group of words.

The murder of a large number of people from a particular nation or ethnic group.

The correct answer is: Genocide.

Key Points

• The term "genocide" refers to the intentional action to destroy a people—usually defined as an ethnic, national, racial, or religious group—in whole or in part. (जन-संहार)
  • ​For example: The international community condemns genocide as a heinous crime.
• It's a term that has been used to describe horrific events in history where large numbers of a particular group were systematically killed.
• The definition provided in the question, "The murder of a large number of people from a particular nation or ethnic group," aligns directly with the definition of genocide.

Hence, the term "genocide" is the one-word substitute that fits the description given.

Additional Information The other options provided do not match the definition:

• "Geronticide" refers to the killing of the elderly. (वृद्ध हत्या)
  • ​For example: Geronticide, the killing of the elderly, is a term not commonly used or accepted. 
• "Honour killing" is the murder of a member of a family or social group by other members due to the perpetrators' belief that the victim has brought dishonour upon the family or community.
  • ​For example: Honour killings are a tragic consequence of misplaced societal values.
• "Matricide"  means the act of killing one's own mother.