Where does “implacableness” come from?

implacableness (English) comes from English implacable, from Middle English implācāble, from Old French implacable, from Latin implacabĭlis, from Latin im-, from Latin īn-, from Latin în, from Latin en — in.

implacableness (English): The quality of being implacable

Definitions

  1. The quality of being implacable

Ancestry of “implacableness”, step by step

implacableness traces back through two separate lines of ancestry.

via English implacable

StepLanguageWordMeaning
1EnglishimplacableNot able to be placated or appeased; Impossible...
2Middle Englishimplācābleimmitigable, unappeasable
3Old Frenchimplacableharsh, unrelenting; implacable
4Latinimplacabĭlisunappeasable, implacable
5Latinim-Alternative form of in-; form of "in"; in
6Latinīn-un-, non-, not
7Latinînin, at, on, upon, from (space)
8Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
9Proto-Italicenin
10Proto-Indo-Europeanh₁énin

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European h₁én
implacableness — Etymology, Origin & Word History | Etymology Explorer