The crossword solution for the term 'make less hostile' is 'DISARM'. Disarmament is the process of reducing or eliminating a nation's military capability. It is often used as a tool to reduce the risk of war and promote peace. Disarmament can also refer to the reduction of weapons of mass destruction, such as nuclear weapons. Disarmament is an important part of international security and is often seen as a way to reduce the risk of conflict.