waste/ weɪst /

1.noun [of resources] [ food] [ money] 
浪费

2.noun [u] 
(rubbish) 废料

3.adjective [+material] 
废的

4.vt.[+money] [ energy] [ time] 
浪费

5.vt.[+opportunity] 
失去

6.n pl
wastes (land) 荒地

what a waste!
真可惜!
it's a waste of money
这是白费钱
it's a waste of time
这是浪费时间
you're wasting your time
你是在浪费时间
to go to waste
浪费掉
to lay waste (to) sth
毁坏某物