noun active resistance or opposition; conflict or war
adjective of or relating to acts of war or conflict
Hostilities broke out between the two opposing forces.
The two countries were on the brink of hostilities.
Efforts were made to de-escalate the hostilities between the warring factions.
In a novel about war, the author vividly described the hostilities between the two countries.
The psychologist noticed a pattern of increased hostilities in the workplace, leading to a toxic environment.