adj.
Pronunciation: ( ˌ )i- ' nes-t ə -m ə -b ə l
Function: adjective
Etymology: Middle English, from Middle French, from Latin inaestimabilis, from in- + aestimabilis estimable
Date: 14th century
1 : incapable of being estimated or computed <storms caused inestimable damage>
2 : too valuable or excellent to be measured or appreciated <has performed an inestimable service for his country>
– in · es · ti · ma · bly \ -bl ē \ adverb