The term 'THOROUGHLY INVESTIGATES' can be summarized by the four-letter word 'VETS'. This term is used to describe the process of examining something in detail, usually for the purpose of determining its condition or suitability. Vetting is commonly used in the military and law enforcement, where it is used to evaluate potential recruits or suspects. It is also used in other fields such as finance, where it is used to assess the financial health of a company or individual. In all cases, the goal of vetting is to ensure that only those who are qualified and trustworthy are allowed to participate.