Noah Webster
Frank
FRANK, adjective
1. Open; ingenuous; candid; free in uttering real sentiments; not reserved; using no disguise. Young persons are usually frank; old persons are more reserved.
2. Open; ingenuous; as a frank disposition or heart.
3. Liberal; generous; not niggardly. [This sense is now rare.]
4. Free; without conditions or compensation; as a frank gift.
5. Licentious; unrestrained. [Not used.]