Where does “unimpressibleness” come from?

unimpressibleness (English) comes from English unimpressible, from English impressible, from English impress, from Middle English impressen, from Latin impressus, from Latin imprimo, from Latin īn-, from Latin în — in.

unimpressibleness (English): The state or condition of being unimpressible; inexcitability, sangfroid

Definitions

  1. The state or condition of being unimpressible; inexcitability, sangfroid

Ancestry of “unimpressibleness”, step by step

StepLanguageWordMeaning
1EnglishunimpressibleNot impressible; not sensitive; apathetic
2EnglishimpressibleCapable of being impressed; susceptible of...
3EnglishimpressTo affect strongly and often favourably; To make...
4Middle Englishimpressen
5Latinimpressuspressed, printed, imprinted, stamped
6LatinimprimoI press, impress; I print, imprint, stamp
7Latinīn-un-, non-, not
8Latinînin, at, on, upon, from (space)
9Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
10Proto-Italicenin
11Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Proto-Italic en