'soluble' originates from Latin, specifically the word 'solubilis,' where 'solvere' meant 'to loosen or dissolve.'

'solubilis' transformed into the Old French word 'soluble,' and eventually became the modern English word 'soluble.'

Initially, it meant 'capable of being loosened or dissolved,' but over time it evolved into its current meanings of 'capable of being dissolved in a liquid' and 'able to be solved or explained.'