Ingenuous

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

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.