English

inofficial

From in- + official.

Proto-Indo-European *h₁én ‘in’

Proto-Germanic *in ‘into’

English in-

Proto-Indo-European *h₃ep- ‘to work’

…

Latin officium ‘duty, service’

Latin officiālis

Old French official ‘court official’

Middle English official

Today it means

adj Synonym of unofficial.

Language periods are conventional ranges, not dates for this word.

Etymograph / inofficial