1. 无益：intuitive thought 直觉思想 | inutility 无益 | invade 侵入
2. 无用：inutile 无益的 | inutility 无用 | invade 侵略
3. 无益的物：inurn 把骨灰装罐 | inutility 无益的物 | invade 宰割
4. 无用,无益：inutile 无用的,无益的 | inutility 无用,无益 | utensil 用具
1. Cai says he was first drawn by the " inutility " of the inventions.
noun
1. the quality of having no practical use
Synonym: uselessness unusefulness