unprofitably 

英汉解释

adv. 无利可图地；徒劳无益地；赚不到钱地

同义词

r. fruitlessly，gainlessly，profitlessly，unproductively

反义词

r.   fruitfully，productively，profitably

参考例句

1. There are others to whom Idleness dictates another espedient, by which life may be passed unprofitably away without the tediousness of many vacant hours.
对于其他一些人来说，懒散还有另一种表现形式。时光纵然白白流逝，而他们并没有因为许多小时没有做什么而感到无聊乏味。
2. There are others to whom Idleness dictates another expedient, by which life may be passed unprofitably away without the tediousness of many vacant hours.
对于其他一些人来说，懒散还有另一种表现形式，时光纵然白白流逝，而他们并没有因为许多小时没有做什麽而感到无聊乏味。

英英解释

adv.
  1. without gain or profit
  2. in an unproductive manner

网络释义

unprofitably
无利益;