soluble

adjective

sol·​u·​ble ˈsäl-yə-bəl 

1

: susceptible of being dissolved in or as if in a liquid and especially water

2

: subject to being solved or explained

soluble questions

Did you know?

Soluble looks like a word that should be confined to chemistry labs, though it's often used by nonchemists as well to describe substances that can be dissolved in liquids. On the other hand, the sense of soluble meaning "solvable" is also quite common. In this sense, soluble, like its opposite, insoluble, is usually paired with problem. If only all life's problems were soluble by stirring them in a container filled with water.

Synonyms

• resolvable
• answerable
• feasible
• solvable

Examples of soluble in a Sentence

Sugar is soluble in water.

one murder case that proved to be soluble after all

Recent Examples on the Web

Still, traditional liquid electrolytes used in these batteries tend to form byproducts called soluble polysulfides. —Georgina Jedikovska, Interesting Engineering, 30 Oct. 2025

Almonds and pistachios both contain soluble fiber, a type of fiber that is broken down by bacteria in the large intestine, releasing short-chain fatty acids (SCFAs). —Jillian Kubala, Health, 30 Oct. 2025

Choose water-soluble food that can be added during your watering routine, and don’t fertilize the orchid during dormancy. —Karen Brewer Grossman, Southern Living, 29 Oct. 2025

Soluble Fiber Makes Kiwi a Low-Glycemic-Index Food The soluble fiber in kiwi helps slow digestion and control how quickly sugar gets absorbed into the bloodstream, said Charlize Del Rosario, RD, CNSC, a dietitian at USC Verdugo Hills Hospital, part of Keck Medicine of USC. —Maggie O'Neill, Verywell Health, 28 Oct. 2025

Word History

Etymology

Middle English, from Anglo-French, digestible, laxative, from Late Latin solubilis, from Latin solvere to loosen, dissolve — more at solve

First Known Use

15th century, in the meaning defined at sense 1

Rhymes for soluble

• indissoluble
• insoluble
• revoluble
• voluble

Kids Definition

soluble

adjective

sol·​u·​ble ˈsäl-yə-bəl 

1

: capable of being dissolved in a liquid

sugar is soluble in water

2

: capable of being solved or explained : solvable

a soluble problem

Medical Definition

soluble

adjective

sol·​u·​ble ˈsäl-yə-bəl 

1

: susceptible of being dissolved in or as if in a fluid

2

: capable of being emulsified

a soluble oil