Adjective
Speaking with plain, unreserved sincerity; also, spoken sincerely; as, plain-spoken words.
Source: Webster's dictionaryIt is always a mistake to be plain-spoken. Gertrude Stein
His lyrics, whether or not you liked them, were written with a plain-spoken and full-hearted honesty that meant they were sometimes extraordinarily on the nose, but could equally hit home with force. Source: Internet
Donald emulates his hero Andrew Jackson, a plain-spoken general and president who knew how to represent the common people. Source: Internet