English
extraofficial
From extra- + official.
Proto-Indo-European *h₁éǵʰs ‘out’
Proto-Indo-European *h₁eǵʰsteros
Proto-Italic *eksteros
Latin exter ‘being on the outside’
Latin extrā ‘outside, except, beyond’
English extra-
Proto-Indo-European *h₃ep- ‘to work’
…
Latin officium ‘duty, service’
Latin officiālis
Old French official ‘court official’
Middle English official
English official
Today it means
adj Beyond what is official; not prescribed by official duty.
Language periods are conventional ranges, not dates for this word.
Etymograph / extraofficial