Invaluable comes from the negative prefix in– and the word valuable in its outdated sense of “capable of valuation.”
To complicate it all, invaluable has also been used to mean “worthless,” although its “priceless” sense is much more common.
EXAMPLES OF INVALUABLE
The advice she gave me was invaluable; it completely transformed the way I approached the project.
The experience of traveling to different countries and immersing myself in different languages and cultures has been invaluable to my personal growth and understanding of the world.
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