Of honorable extraction; freeborn; noble; as, ingenuous blood of birth. Noble; generous; magnanimous; honorable; upright; high-minded; as, an ingenuous ardor or zeal. Free from reserve, disguise, equivocation, or dissimulation; open; frank; as, an ingenuous man; an ingenuous declaration, confession, etc. Ingenious.
Disingenuous
Naive and trusting. Demonstrating childlike simplicity. Unsophisticated; clumsy or obvious. Unable to mask one's feelings. Straightforward, candid, open, and frank.