Jackeen :: "Jackeen (n.) A drunken, dissolute fellow..
Keen :: Keen (superl.) Sharp; having a fine edge or point; as, a keen razor, or a razor with a keen edge..
Keen :: Keen (superl.) Acute of mind; sharp; penetrating; having or expressing mental acuteness; as, a man of keen understanding; a keen look; keen features..
Keenness :: Keenness (n.) The quality or state of being keen.
Nankeen :: Nankeen (n.) A species of cloth, of a firm texture, originally brought from China, made of a species of cotton (Gossypium religiosum) that is naturally of a brownish yellow color quite indestructible and permanent..
Nankeen :: Nankeen (n.) An imitation of this cloth by artificial coloring.