say it: in-VA-lyuh-buhl
invaluable is an adjective meaning "having incalculable monetary, intellectual, or spiritual worth". It is pronounced /ˌɪnˈvæljəbəl/ — in-VA-lyuh-buhl. It carries one recorded sense.
Definitions, synonyms and semantic relations for invaluable come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.