invaluable

American  

[in-val-yoo-uh-buhl] / ɪnˈvæl yu ə bəl /

adjective

1. beyond calculable or appraisable value; of inestimable worth; priceless.

   an invaluable art collection; her invaluable assistance.

   Synonyms:

   precious

   Antonyms:

   worthless

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invaluable British  

/ ɪnˈvæljʊəbəl /

adjective

1. having great value that is impossible to calculate; priceless

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Other Word Forms

• invaluableness noun
• invaluably adverb

Etymology

Origin of invaluable

First recorded in 1570–80; in- ³ + valuable, in obsolete sense “capable of valuation”

Example Sentences

“Her experience will be invaluable as we continue to drive long-term, sustainable growth,” Weston said.

From The Wall Street Journal

"I should like to thank our staff for their hard work, often in difficult circumstances. I should also like to thank the women and families that use our services for their invaluable feedback," he added.

From BBC

That same property, however, makes them invaluable tools for probing the deepest laws of physics.

From Science Daily

Our recommendations support the use of probabilities instead of dichotomous “p-values” and the inclusion of findings from related studies to evaluate safety and effectiveness—an invaluable advancement for rare-disease research.

From The Wall Street Journal

Almost two years on, he said a new support service for people like him who are living with mesothelioma has been "invaluable" for him and his family in dealing with the diagnosis.

From BBC

Related Words

• helpful
• valuable