Efflux is a term used to describe the movement of something out of an area or container. It can refer to the flow of liquid, gas, or particles. The crossword solutions for efflux include EFFUSION (8 letters), EMANATION (9 letters), OUTPOURING (10 letters), DRAIN (5 letters), and OUTFLOW (7 letters). EFFUSION is the act of flowing out, while EMANATION is the act of emitting something from a source. OUTPOURING is a large amount of something that is released, while DRAIN is a pipe or channel that carries away liquid or gas. OUTFLOW is the act of flowing outwards.