defenceless形容詞1無防備的、毫無防衛能力的、無助的英式拼法The kittens were tiny and completely defenceless without their mother.那些小貓咪體型很小,沒有母貓在旁邊就毫無防衛能力。2無武裝的、不設防的Enemy planes bombed the defenceless coastal town for three days.敵機對這座不設防的海邊小鎮轟炸了三天。