Meaning & use
invaluable
So useful, important, or precious that its worth cannot be measured.
See it in a sentence
Her advice during the negotiation proved invaluable to the final deal.
Local volunteers played an invaluable role in the disaster recovery effort.
A note on using this word
"Invaluable" does not mean lacking value; despite the prefix in-, it means more valuable than can be measured, unlike the simpler word "valuable."
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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