unneighbourly

/ʌnˈneɪbərli/
adjective
  1. Not friendly, helpful, or considerate toward people who live nearby.
    • It was unneighbourly of him to play loud music late at night.
    • Leaving trash in the hallway is considered unneighbourly behavior.
    • She felt that ignoring the new family was an unneighbourly act.
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