The word "un hostile" represents a state of friendliness or amicability towards someone or something. Its opposite, therefore, is a state of aggression, hostility or antagonism. Some common antonyms for "un hostile" are hostile, unfriendly, aggressive, antagonistic, belligerent, and confrontational. These words represent a state of being unwelcome, uninviting or inhospitable towards someone or something. Other antonyms for "un hostile" include friendly, welcoming, cordial, affectionate, congenial, and hospitable. These words represent a state of being welcoming, open-hearted and friendly towards someone or something, and typically suggest a sense of warmth and hospitality.