The word "defenceless" means being unable to protect or defend oneself against harm or danger. It refers to a lack of means or ability to defend or resist an attack or threat. Full definition
Similarly, the PDP advised President Mohammadu Buhari to pay condolence visit on the people of Benue State to condole with victims of the «horrific killing of defenceless Nigerians by marauders.» (newsdiaryonline.com)
The only problem was that it leaves you completely defenceless against enemy fire — It's hard to hold onto a rope when your torso is being filled with bullets, I guess. (techradar.com)
Pope Francis has closed his traditional Sunday blessing by saying «nothing can justify» the use of chemical weapons against defenceless people, and called for those responsible for a suspected attack in Syria to seek negotiations. (premierchristianity.com)