spineless

形容词 spineless:

1. weak in willpower, courage or vitality
   同义词：namby-pamby, gutless, wishy-washy
2. lacking a backbone or spinal column
   同义词：invertebrate
3. lacking spiny processes
4. lacking thorns
   同义词：thornless

1. He's too spineless to ask for more money.
   他没有勇气要求更多的钱。