behavior|noun|the way a person acts
comment|verb|to express an opinion about something
pain|noun|a physical feeling of hurt somewhere in the body 
problem|noun|a difficult question or situation with an unknown or unclear answer
threaten|verb|to warn that one will do harm or cause damage
victim|noun|someone that is attacked, injured, killed or made to suffer; someone who is tricked
witness|noun|a person who sees an event and tells what he/she saw
