Where does “efficaciousness” come from?

efficaciousness (English) comes from English efficacious, from Old French efficacieux, from Latin efficāx, from Latin efficiō, from Latin ex, from Latin commūnicō, from Latin commūnis, from Old Latin com(m)oinis — resin.

efficaciousness (English): Quality of being efficacious

Definitions

  1. Quality of being efficacious

Ancestry of “efficaciousness”, step by step

efficaciousness traces back through two separate lines of ancestry.

via English efficacious

StepLanguageWordMeaning
1EnglishefficaciousEffective; possessing efficacy
2Old Frenchefficacieux
3Latinefficāxefficacious, effectual, powerful, efficient
4Latinefficiōto make out or work out; effect, execute, complete, accomplish, make, form, compose
5LatinexA name of the letter "X"; out of, from
6Latincommūnicōto impart, share
7Latincommūniscommon, commonplace, ordinary, general, universal, shared, shared alike, of both sides, belonging to two or more together
8Old Latincom(m)oinis
9Proto-Italickommoiniscommon
10Proto-Indo-Europeanḱom-moy-ni-held in common
11Proto-Indo-Europeanḱómbeside, near, by, with
12Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
13Middle Englishkyt
14Germankittputty certain kinds of cement used for fixing e.g. window panes
15Old High Germankuti
16Proto-West Germanickwidugum, resin
17Proto-Germanickweduzresin

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-Germanic kweduz