The term 'slowing of progress' can be summarized as a DELAY. This term is used to describe a situation in which progress is hindered or slowed down due to certain factors. It can refer to a variety of situations, such as a decrease in productivity, a decrease in efficiency, or a decrease in the rate of progress. In some cases, it can also refer to a complete halt in progress. Slowing of progress can be caused by a variety of factors, such as external forces, internal conflicts, or lack of resources.