spineless
adjective /ˈspaɪnləs/
  /ˈspaɪnləs/
 - (disapproving) (of people) weak and easily frightenedTopics Feelingsc2
 - (of animals) having no spine (= the long bone in the back)                                     
 - (of animals or plants) having no spines (= sharp parts like needles)