Dictionary
in•val•u•a•ble
Pronunciation: (in-val'yOO-u-bul), [key]—
adj.
beyond calculable or appraisable value; of inestimable worth; priceless:
an invaluable art collection; her invaluable assistance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.