| Term | Definition |
| abrupt | broken off; lacking in continuity; steep; sudden; quick and unexpected |
| corrupt | changed ("broken to pieces") from good to bad; vicious; debase; pervert; falsify |
| disrupt | break apart; cause disorder |
| erupt | burst or break out |
| incorruptible | inflexibly honest; incapable of being corrupted or bribed |
| interrupt | break into or between; hinder; stop |
| rupture | break; breaking; hostility |
| bactericide | substance that kills bacteria |
| biocide | substance that destroys many different organisms |
| fratricide | act of killing (or killer of) one's brother |
| fungicide | substance that kills fungi or inhibits their growth |
| genocide | deliberate extermination of a racial or cultural group |
| germicide | substance that kills germs |
| herbicide | substance that kills plants |
| homicide | killing of one human by another |
| infanticide | act of killing (or killer of) an infant |
| insecticide | substance that kills insects |
| matricide | act of killing (or killer of) one's mother |
| patricide | act of killing (or killer of) one's father |
| pesticide | substance that kills rats, insects, bacteria, etc. |
| regicide | act of killing (or killer of) a king |
| sororicide | act of killing (or killer of) one's sister |
| suicide | act of killing (or killer of) one's self |
| tyrannicide | act of killing (or killer of) a tyrant |
| astringent | drawing (the tissues) tightly together; stern; austere; substance that shrinks the tissues and checks flow of blood |
| boa constrictor | snake that "constricts" or crushes its prey in its coils |
| constrict | draw together; render narrower; shrink |
| restrict | keep within limits (literally, "keep back"); confine |
| stricture | adverse criticism (literally, "tightening"); censure; restriction |
| stringent | strict (literally, "binding tight"); rigid; severe |
| unrestricted | not confined within bounds; free; open to all |