Characterized by an inability to mask your feelings; not devious:
— An ingenuous admission of responsibility.

synonym: artless.

Roget 849: simple, plain; homely, homespun; ordinary, household.    unaffected; ingenuous, sincere (artless) 703; free from affectation, free from ornament; simplex munditiis [Lat.] [Horace]; sans facon [Fr.], en deshabille [Fr.].    chaste, inornate^†, severe.    unadorned, bare, unornamented, undecked^†, ungarnished, unarranged^†, untrimmed, unvarnished.    bald, flat, dull.    ... show more

Roget 543: truthful, true; veracious, veridical; scrupulous etc. (honorable) 939; sincere, candid, frank, open, straightforward, unreserved; open hearted, true hearted, simple-hearted; honest, trustworthy; undissembling etc. (dissemble) etc. 544^†; guileless, pure; truth-loving; unperjured^†; true blue, as good as one's word; unaffected, unfeigned, bona fide; outspoken, ingenuous etc. (artless) 703; undisguised etc. (real) 494.    uncontrived.    ... show more

Roget 703: artless, natural, pure, native, confiding, simple, lain, inartificial^†, untutored, unsophisticated, ingenu^†, unaffected, naive; sincere, frank; open, open as day; candid, ingenuous, guileless; unsuspicious, honest etc. 939; innocent etc. 946; Arcadian^†; undesigning, straightforward, unreserved, aboveboard; simple-minded, single-minded; frank-hearted, open-hearted, single-hearted, simple-hearted.    free-spoken, plain-spoken, outspoken; blunt, downright, direct, matter of fact, unpoetical^†; unflattering.    ... show more

Polish: szczery

Lacking in sophistication or worldliness:
— His ingenuous explanation that he would not have burned the church if he had not thought the bishop was in it.

synonym: innocent.