Where does “inefficiency” come from?

Inefficiency comes from Latin inefficientia, formed from the prefix in- (not) and efficientia (accomplishment), ultimately deriving from Proto-Indo-European roots meaning not and to go.

inefficiency (English): Lack of efficiency or effectiveness

Definitions

  1. Lack of efficiency or effectiveness

Ancestry of “inefficiency”, step by step

StepLanguageWordMeaning
1EnglishefficiencyThe extent to which time is well used for the...
2Latinefficientiainflection of efficiēns: ## nominative neuter...
3Latinefficiensproducing, and related senses of the action;...
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
Every word from Proto-Germanic kweduzEvery word from Proto-West Germanic kwiduEvery word from Old High German kuti