water insoluble
/ˈwɔtər ɪnˈsɑljəbəl/
adjective
- Unable to dissolve in water.
- The paint is water-insoluble, so you need a special solvent to clean the brushes.
- Some vitamins are water-insoluble and must be taken with fatty foods.
- Oil is water-insoluble, which is why it floats on top of water.
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