will have massacred

• future perfect

  future perfect

  Used to describe an action that will be fully completed or achieved by a specific point in the future.

  of massacre.
  massacre

  noun

  the unnecessary, indiscriminate killing of a large number of human beings or animals, as in barbarous warfare or persecution or for revenge or plunder.

Related Words

• assassination
• bloodbath
• bloodshed
• carnage
• extermination
• genocide
• murder
• slaughter
• slaying