in·estimable \(ˈ)in, ən+\adjective Etymology: Middle English, from Middle French, from Latin inaestimabilis, from in- in- (I) + aestimabilis estimable — more at estimable 1.: incapable of being estimated or computed < inestimable errors > 2.: too valuable or excellent to be measured or appreciated : above all price < has performed an inestimable service for his country > • in·estimable·ness\“+\noun • in·es·ti·ma·bly\-blē, -bli\adverb