Where does “coefficacy” come from?

coefficacy (English) comes from English efficacy, from Old French efficace, from Latin efficacia, from Latin efficāx, from Latin efficiō, from Latin ex, from Latin commūnicō, from Latin commūnis — resin, gum; to say, speak.

coefficacy (English): Joint efficacy; an instance of things working...

Definitions

  1. Joint efficacy; an instance of things working...

Ancestry of “coefficacy”, step by step

coefficacy traces back through two separate lines of ancestry.

via English efficacy

StepLanguageWordMeaning
1EnglishefficacyAbility to produce a desired effect under ideal...
2Old Frenchefficace
3Latinefficaciaefficacy, effectiveness, efficiency; virtue;...
4Latinefficāxefficacious, effectual, powerful, efficient
5Latinefficiōto make out or work out; effect, execute, complete, accomplish, make, form, compose
6LatinexA name of the letter "X"; out of, from
7Latincommūnicōto impart, share
8Latincommūniscommon, commonplace, ordinary, general, universal, shared, shared alike, of both sides, belonging to two or more together
9Old Latincom(m)oinis
10Proto-Italickommoiniscommon
11Proto-Indo-Europeanḱom-moy-ni-held in common
12Proto-Indo-Europeanḱómbeside, near, by, with
13Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
14Middle Englishkyt
15Germankittputty certain kinds of cement used for fixing e.g. window panes
16Old High Germankuti
17Proto-West Germanickwidugum, resin
18Proto-Germanickweduzresin
19Proto-Indo-Europeangʷet-resin, gum; to say, speak

via English co

StepLanguageWordMeaning
1EnglishcoClipping of company; they; them
2EnglishcompanyA team; a group of people who work together...
3Middle EnglishcompanyeA company, band, small group, or team of people;...
4Old Frenchcompaigniecompanionship
5Old FrenchcompainAlternative form of compaing; friend; companion
6Latincompāniōcomrade
7Latincom-allomorph of con-
8Latincon-Used in compounds to indicate a being or bringing...
9Latincumwith, along with; at; -fold
10LatinquomAlternative form of cum
11Proto-Indo-Europeankʷóm
12Proto-Indo-EuropeankʷosSee *kʷis
13Proto-Indo-Europeankʷ-The primary interrogative root
Every word from Proto-Indo-European gʷet-Every word from Proto-Germanic kweduzEvery word from Proto-West Germanic kwidu