unaided       
adjective, adverb uk/ˌʌnˈeɪ.dɪd/ us/ˌʌnˈeɪ.dɪd/
 无外援的;独立的
without any help from anyone else; independently
  Since his accident, he hasn't been able to walk unaided. 自从出了车祸后,他一直不能独自行走。 
 The two explorers attempted an unaided walk across the South Pole. 两位探险者试图独自徒步穿越南极点。