The term 'diffuse slowly' can be summarized by the word 'OSMOSE, ' which is a six-letter word. Osmosis is a process in which molecules of a solvent, such as water, pass through a semipermeable membrane from a less concentrated solution into a more concentrated one. This process occurs naturally and is used to describe the movement of particles from an area of high concentration to an area of low concentration. In other words, it is the process of diffusion, or the spreading out of particles, over time.