Sentry means an obstacle or a person who has a bad influence. In other words, obstacles appear in your business or what you are trying to do, or someone appears in your way. Or the work that was being pushed for could be put on hold due to illness. In times like this, it is also a good idea to take your time and relax. It is necessary to have enough rest to understand the nature of the problem and to take care of it one by one from the beginning.