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

Provides Gentle Support for Your Gut and Digestion Apples contain pectin, a type of soluble fiber that plays an important role in keeping your digestive system running smoothly. —Julie Scott, Verywell Health, 8 Oct. 2025

As a whole grain rich in soluble fiber, oatmeal helps slow digestion and promote steady blood sugar levels. —Brianna Tobritzhofer, Health, 7 Oct. 2025

Flax is known to promote good digestive health and prevent constipation, thanks to plenty of insoluble fiber and soluble fiber (both of which facilitate digestion and regular bowel movements through slightly different means). —Christina Chaey, Bon Appetit Magazine, 30 Sep. 2025

Limestone is soluble in water and can dissolve over periods of long exposure, civil engineers previously told The Tennessean. —Hadley Hitson, Nashville Tennessean, 29 Sep. 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