inestimable

[ in-es-tuh-muh-buh l ]

/ ɪnˈɛs tə mə bəl /

incapable of being estimated or assessed.

too large or great to be estimated or appreciated: The flood caused inestimable damage.

of incalculable value; valuable beyond measure; priceless: jewels of inestimable worth.

Origin of inestimable

First recorded in 1350–1400; Middle English word from Latin word inaestimābilis. See in-³, estimable

in·es·ti·ma·bil·i·ty, in·es·ti·ma·ble·ness, noun in·es·ti·ma·bly, adverb

They may not sell gold coins as quickly and as well as excessive alarmism, but they have the inestimable advantage of being true.

Why the Rush to Sell Gold Coins is Drowning Out Real Critiques of Obama |David Frum |April 1, 2013 |DAILY BEAST
It is but of late that the inestimable importance of political principles has been adequately apprehended.

Caleb Williams |William Godwin
This inestimable right of representation they have never solicited.

The Works of Samuel Johnson, Vol. 6 |Samuel Johnson
It was but a poor acknowledgment for the inestimable benefit of occasionally talking with Falstaff over a quart of sack.

Obiter Dicta |Augustine Birrell

And she enjoyed the inestimable privilege, accorded to her by the Mother Superior, of weeping as much as she pleased.

McClure's Magazine, Vol. XXXI, September 1908, No. 5 |Various
Here is the indescribable, inestimable, unmistakable impress of genius.

Spare Hours |John Brown

inestimable

/ (ɪnˈɛstɪməbəl) /

not able to be estimated; immeasurable

of immeasurable value

inestimability or inestimableness, noun inestimably, adverb