“Latin's word for 'be strong' became the English measure of everything worth having.”
The Latin verb 'valere' meant to be strong, to be well, or to be worth a certain amount. Roman writers used it freely in all three senses: a healthy man 'valebat,' a good general 'valebat' on the battlefield, and a piece of gold 'valebat' a certain number of denarii. The farewell 'vale,' meaning be well, came from the same verb. By the time Latin evolved into Old French, 'valere' had produced 'valoir,' meaning to be worth, and its feminine past participle 'value' became a standalone noun for worth or price.
English borrowed 'value' from Old French in the 14th century. The early citations are almost entirely commercial: a value is what a thing is worth in exchange, the price you could fairly ask or receive for it. The 14th-century translator John of Trevisa used the word in 1387 in this strictly market sense. The economic sense was primary for centuries, and it still anchors the word: 'good value' means you received more than you paid for.
The philosophical expansion came later and more slowly. By the 17th and 18th centuries, 'value' had begun to absorb meanings beyond the market: the value of a friendship, the value of education, the value of liberty. John Locke and Adam Smith both used the word in ways that shuttled between economic and moral meaning. By the 19th century, moral philosophers had made 'values' in the plural a technical term for the principles and ideals that guide a person or a culture.
The same Latin root 'valere' gave English an extraordinary range of words. 'Valor' came directly from Latin 'valor,' meaning worth or courage. 'Valid,' 'invalid,' and 'validate' trace the same path. 'Prevalent,' 'equivalent,' and 'ambivalent' all carry the same root, hidden under prefixes. 'Convalescent' means literally one who is getting strong again, and 'value' is the word that kept the double sense of worth and strength longest.
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Today
We use 'value' for things we cannot weigh. A friendship has value, a principle has value, an afternoon in a garden has value. The word has carried this dual load, economic and moral, for centuries, which is why it still works across such different contexts. When you ask what something is worth, you are always asking more than one question.
The strange thing about value is that it increases when shared. Money divides; value multiplies. A song has the same value whether one person hears it or a million. This is the word that slipped free of the market and became something the market cannot name.
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