Although invaluable has a negative prefix, it is an adjective meaning extremely useful, indispensable or so valuable that a value can’t be set. Valuable implies a significant worth, usually in monetary terms. Invaluable means having great value that is impossible to calculate; priceless. Find out the origin, usage, and antonyms of this adjective, as well as translations in Spanish and other languages. Word Choice: Valuable vs. Invaluable “Valuable” and “ invaluable ” are tricky words. They look like opposites, but there’s actually a big overlap in their meanings. So, what is the difference between something being “valuable” and something being “ invaluable ”? In this post, we’ll help you make the right choices in your writing. Valuable (Worth a Lot of Money or Important) The word “valuable” is usually an adjective meaning “worth a lot of money”: They kept the most ... Invaluable means having great value that is impossible to calculate; priceless. See the origin, synonyms, antonyms, and usage of the word invaluable in sentences from various sources.