The objective of WATER is to create concepts, theories, and technology for intelligent and trusted wireless connectivity beyond 5G. The research vision is motivated by three trends: (1) The continuous increase in the number and heterogeneity of connections; (2) The wireless infrastructure will evolve towards more openness and disaggregation; (3) A growing number of industries will require reliable, resilient, and predictable wireless connectivity. WATER pursues this vision with four key concepts and ideas: (1) Redesign communication models and protocols to account for the ever-increasing intelligence at the devices; (2) Make learning and predictability and integral part of spectrum allocation and usage; (3) Enrich the communication models with the new developments in physics, such as electromagnetic metamaterials; (4) Enable data exchange by flexibly trading off between privacy and extraction of value from the data.