(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