| A | B |
|---|
| antagonist | an opponent |
| antiseptic | something used to kill germs |
| antisocial | unable to associate with other people |
| contradiction | a statement that is opposite to another statement |
| counterbalance | a weight used to balance another weight |
| counterporductive | producing the opposite of what is desired or intended |
| oblique | not straight; slanting |
| obnoxious | very unpleasant and objectionable |
| obscure | to make unclear; to conceal |
| obstinate | unyielding; unreasonably determined to have one's own way |
