repercussions - The effects or results of an action, event, or decision, especially those that are unintended or negative.

His decision to suddently quit the company without notice had serious repercussions, hurting his reputation and making it hard to find another job.
astute - Ability to understand things quickly and clearly, and to use the knowledge well
From a very early age, Gail instinctively knew everything about business, and and after college she proved to be an astute business woman, and became a millionaire before the age of 30.