A party that the court feels is hostile against the party they are supposed to testify for. They can be cross examined if they are called. They can be impeached by their own credibility.
Polarize is to force a something or someone to go in only one direction, or to cause people to divide into two very distinct groups. 1  When a special microscope forces the transverse waves created by a light to be focused only in one direction, this is an example of when it polarizes. When a political leader pits one group of people in society against another using inflammatory speech, this is an example of when he polarizes the groups.
radicalize - make more radical in social or political outlook; Her work in the developing world radicalized her alter, change, modify - cause to change; make different; cause a transformation; The advent of the automobile may have altered the growth pattern of the city; The discussion has changed my thinking about the issue Translations