profitless 

英汉解释

adj. 无益的

同义词

a. unprofitable

参考例句

1. It is profitless to continue arguing.
继续争论是无益的。
2. It is harmful and profitless that actually the puerpera is eager to choose and employ persons joining filling body.
其实产妇急于用人参补身子是有害无益的。
3. The policy of land circulation would allow the dairy farmers to sell the operation right of their profitless farms in return for a considerable sum of money.
“土地流转”政策，将允许无力通过经营土地而获得收入的奶农卖掉手中的土地使用权，并获得大量资金。

英英解释

adj.
  1. without profit or reward

网络释义

profitless
无益的; 无利的; 无利可图的; 浪费的;
profitless resultless ineffectual unprofitable useless worthless
无益的;