outspoken (adj.)youdaoicibaDictYouDict[outspoken 词源字典]
"given to speaking freely," 1808, originally Scottish, from out (adv.) + -spoken. "The pa. pple. has here a resultant force, as in 'well spoken', 'well read'." [OED]. Related: Outspokenly; outspokenness.[outspoken etymology, outspoken origin, 英语词源]