unofficial
adjectiveformal/ufisiˈozu/low
o·fi·ci·o·so
Definition
Not official, but functioning as such or considered as such; unofficial but authorized or tolerated.
News of the agreement came from unofficial channels.
He made an unofficial comment to the reporters.
Common collocations
unofficial channelunofficial sourceunofficial statement
Etymology
Do latim 'officiosus' (prestativo, zeloso).