backwood (n.)youdaoicibaDictYouDict[backwood 词源字典]
1709, American English, from back (adj.) + wood (n.) "forested tract." Also backwoods. As an adjective, from 1784.
BACKWOODSMEN ... This word is commonly used as a term of reproach (and that, only in a familiar style,) to designate those people, who, being at a distance from the sea and entirely agricultural, are considered as either hostile or indifferent to the interests of the commercial states. [John Pickering, "A Vocabulary, or Collection of Words and Phrases Which Have Been Supposed to be Peculiar to the United States of America," Boston, 1816]
[backwood etymology, backwood origin, 英语词源]