Abruptly
We call something has taken place abruptly when it occurs suddenly and/or unexpectedly. There are often times when we are trying to find out a solution of a problem or a situation, but we are not able to find the solution, inspite of the effort, then suddenly at one point of time, the solution might appear. This is called the eureka moment. This is different from finding solution that occurs abruptly. We can tell a person has solved something abruptly when he or she utilizes the presence of mind and gives the solution of a novel problem on spot. This construct has a correlation with both, creativity as well as intelligence. Apart from this, abrupt decision are often decision made without proper thought or consideration of the situation. This might therefore lead to a certain kind of catastrophe in future. A situation foe which one is not prepared can also be called a abrupt situation.