Where does “unproficiency” come from?

unproficiency (English) comes from English proficiency, from Latin proficiens, from Latin proficio, from Latin faciō, from Latin -torium, from Latin -tōrius, from Latin -tor, from Proto-Italic -tōr.

unproficiency (English): Lack of proficiency

Definitions

  1. Lack of proficiency

Ancestry of “unproficiency”, step by step

unproficiency traces back through two separate lines of ancestry.

via English proficiency

StepLanguageWordMeaning
1EnglishproficiencyAbility, skill, competence
2Latinproficiensadvancing etc
3LatinproficioI advance, make progress, make headway; I...
4Latinfaciōto do
5Latin-toriumnominative neuter singular of -tōrius; accusative...
6Latin-tōriusory
7Latin-tor-er
8Proto-Italic-tōrForms agent nouns to verb stems
9Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
10Proto-Indo-European-tor-s

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European -tor-sEvery word from Latin -toriumEvery word from Latin -tor