Three Definitions of Comparison and Relationship

If you're praising a quality like thriftiness somebody who's very good with their money the the contradiction would be a spend thrift. The next one is circumstance um which is a little strange so we've thought about what our thing is, compared it to the things around it and asked how it got there and what it might cause. And then circumstances are concerned it's kind of hard to define this oneUm the two sub categories are possible and impossible can this thing possibly be done so it's more if i'm trying to convince someone of something gotcha?