Adjective internecine has 2 senses
  1. internecine - (of conflict) within a group or organization; "an internecine feud among proxy holders"
    Antonym:
    external (indirect, via internal)
  2. internecine, mutually ruinous - characterized by bloodshed and carnage for both sides; "internecine war"
    Antonym: bloodless (indirect, via bloody)
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