浪费
làngfèi
to waste; wasteful
verb/adjective
Example
别浪费时间了，我们赶紧开始工作吧。
Bié làngfèi shíjiān le, wǒmen gǎnjǐn kāishǐ gōngzuò ba.
Don't waste time anymore, let's hurry up and start working.
A very practical word for daily life. Can be used for wasting time, money, food, or resources. Often used in environmental and efficiency contexts.