ə̇n+ adjective
Etymology: in- (I) + value, v. + -able
1. : of an excellence or worth beyond measure : of incalculable value : priceless
fellow townsmen gave him a standing ovation for his invaluable services to the community
a flair for languages is invaluable to the career diplomat
his firsthand knowledge of the area was invaluable to the search party
2. archaic : of no value : worthless
flattered myself I might not be altogether invaluable to your ladyship — George Colman †1836
Synonyms: see costly