Definition of unofficious in English:

unofficious

Pronunciation /(ˌ)ʌnəˈfɪʃəs/

adjective

  • Not officious. In later use especially: disinclined to intervene; unobtrusive.

Origin

Early 17th century; earliest use found in John Florio (1553–1625), author and teacher of languages. From un- + officious.