?无防御
... obviousnessobvious的名词形式... defencelessness无防御 bleaknessbleak的名词形式...
?无防备
... defencelessly adv无防御地 defencelessness n无防御；无防备 defend vt防守；为……辩护 ...
defencelessness:
defenceless +? -ness
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。