0 in a way that shows a lack of determination and an unwillingness to take any risks: --
Beside one of them a tall young man was sunk spinelessly in a chair, relaxed to the still warmth of the day.
Not having shown that consideration for anybody, they might at least have been less spinelessly indulgent of her.
The veteran broadcaster laid into MPs for spinelessly "doing what they're told".
Politicians yield spinelessly to the short-term interests of fishermen.
You don't have to sit back spinelessly and let things happen.