The term 'sum up' can be defined as to give a brief summary of something. This can be done in a variety of ways, such as recapping (5 letters), recapitulating (12 letters), taking an INVENTORY (9 letters), adding (3 letters), estimating (8 letters), totting (3 letters), totaling (5 letters), sizing up (6 letters), balancing (7 letters), and summarizing in a NUTSHELL (8 letters). All of these terms refer to the same concept of providing a concise overview of a situation or topic.