The term 'REALLY SOAK' can be broken down into three crossword solutions: SOP (3 letters), SATURATE (8 letters), and TAKEADEEPBATH (13 letters). SOP stands for Standard Operating Procedure, which is a set of instructions that outlines how to perform a task. SATURATE means to soak something completely, usually with a liquid. Finally, TAKEADEEPBATH is an idiom that suggests taking a long, relaxing bath. All three of these terms are related to the idea of soaking or immersing oneself in something.