untamed       
adjective uk/ʌnˈteɪmd/ us/ʌnˈteɪmd/
 未开发的,原始的
left in a natural or wild state
  the image of the West as an untamed wilderness 西部尚是一片未开发荒野的形象 
 his untamed beard 他乱蓬蓬的胡子 
 Synonym: wild 
Opposites: manicured (TIDY)tame (NOT WILD)