wasteful

形容词 wasteful:

1. inefficient in use of time and effort and materials
   同义词：uneconomical
2. tending to squander and waste
3. laying waste- Shakespeare

1. The energy shortage of the world results partly from wasteful use by the industrialized countries.
   世界能源的短缺，部分是由于工业化国家挥霍能源而引起的。
2. We must avoid wasteful duplication of effort.
   我们必须避免无谓的重复劳动。
3. Wasteful people usually end up in debt.
   挥霍浪费者最后往往负债。
4. Recklessly wasteful; wildly extravagant.
   恣意挥霍的毫不在意地浪费的; 极其奢侈的

waste.ful

adj.（形容词）
Marked by or inclined to waste; extravagant.
浪费的：以浪费为特征或倾向于浪费的；挥霍的

【引伸】
waste.fully
adv.（副词）
waste.fulness
n.（名词）