Having a free heart, in various senses; frank, open, unreserved; not burdened with anxiety, guilt, or suspicion; acting on the spontaneous impulse…

Straightforward, direct, and honest in speech and behaviour; free from deceit or subterfuge.

Of a person: given to plain speaking; unreserved, direct, outspoken; (also) simple, unpolished, or unsophisticated in speech.

Of language (or the speaker). Plainspoken, outspoken (often in a bad sense); unreserved, not mincing matters.

Given to speaking freely and without reserve; not concealing one's opinions; frank, blunt.

Of speech: expressing sentiments or opinions without reserve; (of an opinion) expressed without reserve; frank, outspoken.

Not minced (in various senses); that has not been cut up or ground into very small pieces; (of speech, words, etc.) direct, unaffected, blunt.

Free from reserve or restraint in speech or behaviour; frank, candid; uninhibited.

Frank, open, ingenuous, straight-forward, sincere in what one says.

Open, candid, forthright; fair, honest, transparent. In later use also: legal, legitimate; open to inspection, regulation, etc.

Of language: unguarded, outspoken; lacking restraint or refinement. Now rare.

Not prevaricating; not swerving from the proper course, or from straightforward statement; undeviating.

That speaks plainly; candid, frank; clear, direct. Cf. plain-spoken, adj.

Given to talking loudly, noisy. Now more usually: vocal, outspoken.

figurative. Of persons and their manner, actions, etc.. Good-naturedly blunt, frank, or plain-spoken; rough and hearty; usually giving the notion of…

Originally Scottish. Of a person, etc.: given to speaking out; unreserved or frank in one's opinions or speech.

(un-, prefix1 affix 4.)

Of persons, their dispositions or conduct: Consistent, undeviating in purpose, single-minded. Also (now usually), free from duplicity or concealment…

(un-, prefix1 affix 4.)

given to speaking plainly; unreserved; outspoken.

Designating a conversation, discussion, or other exchange held privately between (usually) two people, which is direct, frank, and sincere…

Direct, undeviating. colloquial. Of an utterance: Outspoken, unreserved. Also, straightforward, not evasive. straight talk n. a piece of plain…