Where does “inestimably” come from?
inestimably (English) comes from English inestimable, from Middle French inestimable, from Latin inaestimābilis, from Latin aestimabilis, from Latin -bilis, from Proto-Italic -ðlis, from Proto-Indo-European -dʰlis, from Proto-Indo-European -dʰlom — Alternative form of *-trom; instrumental suffix;...
inestimably (English): In an inestimable manner
Ancestry of “inestimably”, step by step