unskillfulness resulting from a lack of training
同义词：awkwardness??/??clumsiness??/??ineptness??/??maladroitness??/??slowness
having no qualities that would render it valuable or useful
同义词：worthlessness
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。