Not feigned, pretended, or simulated; sincere, genuine, true, real.

Of an action, feeling, etc.: done with or expressive of truthfulness, fairness, or integrity of character or intention; free from deceit; genuine…

Of a person: upright, righteous, pious.

(un-, prefix1 affix 4.)

Of persons and their actions: Characterized by integrity; incorruptible, honest, upright. Obsolete.

Containing no element of dissimulation or deception; not feigned or pretended; real, true.

Seriously intended, as opposed to feigned. rare.

Free from fraud.

figurative. Not invested with any specious or deceptive appearance or quality; open, undisguised; not influenced or affected by something.

(un-, prefix1 affix 4.)

Plain; straightforward; unambiguous. Obsolete.

(un-, prefix1 affix 4.)

Free from deceit.

Of actions, etc.: Proceeding from or characterized by sincerity of heart or purpose.

(un-, prefix1 affix 1.)

Proceeding from or characterized by sincerity or honesty of mind.

(un-, prefix1 affix 1.)