Leaching away refers to the process of something gradually dissolving or disappearing. There are numerous synonyms that can be used in place of this phrase. Some of the synonyms for leaching away include draining, seeping, leaking, escaping, evaporating, dissipating, and dissolving. When something gradually disappears over time, it can also be described as evaporating, dissipating, or dissolving. When something leaks or seeps out, it suggests a slow and gradual process of loss. The word "draining" can be used to describe something that is losing its substance or vitality quickly. By using these synonyms, you can enhance your writing and make it more effective and engaging.