It's important not to throw away money on unnecessary purchases.
throw away
Frequency:
75
%
It's a shame to throw away perfectly good food.
throw away
Frequency:
70
%
Don't throw away this opportunity to further your education.
throw away
Frequency:
65
%
She didn't want to throw away her chance at a promotion.
Idiomatic Expressions for throw away
Phrase: throw away the key
Meaning: to lock something up securely and permanently
Usage: The criminal was sentenced to life in prison with no chance of parole - they might as well throw away the key.