副詞：有缺陷地、不充分地
常見搭配詞：
- work / perform deficiently
工作表現不佳 - be deficiently designed / marked
設計不好 / 標示不清
例句：
- When one is depressed, his / her liver often work deficiently.
當一個人沮喪時，他的肝臟功能就會有問題 - The system was deficiently designed.
那個系統的設計不好，有缺陷 - The road to the village was so deficiently marked that we had a hard time finding it.
到那村子的路標示不清，我們幾乎找不到路
同義詞：
- inadequately 不足地、不夠好地 adv.
- poorly 不好地 adv.
- insufficiently 不足地、不充分地 adv.
衍生字：
- deficiency 缺少、不足 n.
- deficient 缺乏的、不足的 adj.
