unsoluble
/ʌnˈsɑːljəbəl/
adjective
- Not able to be dissolved in a liquid.
- The chemist tested whether the powder was soluble or unsoluble in alcohol.
- Sand is unsoluble in water, so it settles at the bottom.
- Some minerals are unsoluble in acid, making them hard to analyze.
- Not able to be solved or explained; insoluble (of a problem or mystery).
- The math problem was unsoluble with the methods they had learned.
- They faced an unsoluble conflict between their personal values and their job duties.
- The ancient riddle seemed unsoluble to even the wisest scholars.
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