Meaning : Characterized by an inability to mask your feelings. Not devious.
Example :
An ingenuous admission of responsibility.
Synonyms : artless
Not straightforward or candid. Giving a false appearance of frankness.
An ambitious, disingenuous, philistine, and hypocritical operator, who...exemplified...the most disagreeable traits of his time.Meaning : Lacking in sophistication or worldliness.
Example :
A child's innocent stare.
His ingenuous explanation that he would not have burned the church if he had not thought the bishop was in it.
Synonyms : innocent