adjective. Pertaining to a confrontation; characterized by, or given to initiating hostile encounter; in-your-face.

adjective. of or relating to confrontation

"He wants her to give up the idea of international sanctions on Myanmar and he wants her change what he calls her confrontational stance."

Congregational  aberrational  coeducational  computational  conformational  

adversarial  all-or-nothing  antagonistic  combative  defeatist