worthlessness

n. lack of value, lack of importance

Noun
1. having no qualities that would render it valuable or useful; "the drill sergeant's intent was to convince all the recruits of their worthlessness"
(antonym) worth
(hypernym) quality
(hyponym) fecklessness
2. the quality of being without practical use
(hypernym) inutility, uselessness, unusefulness

jin1 yu4 qi2 wai4, bai4 xu4 qi2 zhong1
Gold and jade on its outside, but rotten cotton on its inside.
Said of something superficially attractive but actually worthless. All that glitters is not gold. Compare with 外强中干 (wai4 qiang1 zhong1 gan1), 华而不实 (hua2 er2 bu4 shi2) and 半瓶子醋 (ban4 ping2 zi3 cu4).