What do we call the demeanor that shows aggressive resistance or opposition?

The demeanor that shows aggressive resistance or opposition is best described as 'hostile.' This term typically refers to a negative, unfriendly attitude or behavior that is openly opposed to others or to situations. It captures the essence of aggression without necessarily implying a physical confrontation.

While 'angry' might denote feelings of displeasure or frustration, it doesn't specifically convey the ongoing opposition or aggression that 'hostile' does. The terms 'belligerent' and 'combative' can also imply hostility, but they often carry connotations of actively wanting to engage in conflict or fighting, which is slightly different from the general sense of being unfriendly or antagonistic that 'hostile' conveys. Thus, 'hostile' succinctly captures the essence of aggressive resistance in a more nuanced way.