Ingenuous

a.
  1. Of honorable extraction; freeborn; noble; as, ingenuous blood of birth.
  2. Noble; generous; magnanimous; honorable; upright; high-minded; as, an ingenuous ardor or zeal.
  3. Free from reserve, disguise, equivocation, or dissimulation; open; frank; as, an ingenuous man; an ingenuous declaration, confession, etc.
  4. Ingenious.

(Formerly) printers did not discriminate between . . . ingenuous and ingenious, and these words were used or rather printed interchangeably almost to the beginning of the eighteenth century.