Definition of unopinionated in US English:

unopinionated

adjective

  • Not opinionated; disinclined to form or express an opinion.

Origin

Late 18th century; earliest use found in John Ash (1724–1779), lexicographer and grammarian. From un- + opinionated.

Pronunciation

unopinionated

/(ˌ)ʌnəˈpɪnjəneɪtɪd/