savvy

(n) - If you have savvy, you have practical knowledge and ability.
(adj) - Someone who is savvy is clever and knows how to deal with situations successfully.

• Synonyms: brainy, clever, deft, experienced, intelligent, keen, sensible, wise
• Antonyms: clumsy, ignorant, incompetent, stupid, daft
• Etymology: 1785 (noun), 1905 (adjective) Latin, from sapere "be wise, be knowing." The French people borrowed this word to create savez vous? meaning "do you know?" and in Spanish it became sabe usted meaning "you know"
• Example:  Some people are very nature savvy, and they work hard to sustain our earth.