solubility

Etymology

It is formed from English soluble + -ity,^{[2][3][4][5][6]} and the OED compares French solubilité, Italian solubilità and Spanish solubilidad.^[2] The adjective soluble is from Old French soluble, from Late Latin solūbilis (“that may be loosened or dissolved”), from solvō (“to loosen, dissolve”).^[3][2] Etymonline traces the Latin verb to a compound of the reflexive Proto-Indo-European *s(w)e- and the root *leu- (“to loosen, divide, cut apart”).^[3]

Earliest recorded meaning

The quality of being soluble: Merriam-Webster Unabridged dates this sense to 1661,^[4] Etymonline to the 1670s, as the property that makes a body able to be dissolved in a fluid,^[3] and the OED's first quotation is from Nehemiah Grew's experiments on the solution of salts, 1682.^[2]

Semantic evolution

The word began in the language of natural philosophy, for the capacity of a substance to dissolve.^[3][2] Johnson (1755) defined it more broadly as "susceptiveness of separation of parts", quoting Glanvill on "the fragility and solubility" of some bodies.^[7] In botany it was used from 1832 for the ready separation of a structure into parts,^[2] and since 1882, after the adjective's sense "capable of being solved", it could mean that a problem or an equation could be solved or explained.^[2][3] In modern chemistry it also names a measure: the amount of a substance that will dissolve in a given amount of a solvent at a stated temperature and pressure.^[4][8] Chemistry later formed the verb solubilize (1926).^[3]

Timeline

• 1661 – the quality or property of being soluble.^[4] Etymonline dates it to the 1670s and the OED to 1682.^[3][2]
• 1832 – in botany, the ready separation of a structure into parts.^[2]
• 1882 – the capability of being solved or explained.^[2][3]

Meanings

Noun

1. The quality or state of being soluble; the ability of a substance to dissolve.^[8][4][2]
2. The amount of a substance that will dissolve in a fixed amount of a solvent at a given temperature and pressure: The solubility of sugar rises as water warms.^[4][8]
3. The capability of being solved or explained, as of a problem or an equation.^[2][3]

Word family

• solubility product

Related words

• soluble
• insoluble
• solve
• solvent
• solution
• dissolve
• solubilize

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h i j Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
5. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
6. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
7. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
8. ^ a b c Collins English Dictionary (2023), Glasgow: HarperCollins