to not be used.

It's wrong to let good food go to waste.

The companies have spent millions of dollars on new equipment that lets nothing go to waste.

• hang back
• hang by a thread
• hanger-on
• hang fire
• hang hat on
• hang hat on something
• hang head
• hang head in shame
• hang in the balance
• hang in there
• hang it up
• Hang loose!
• hang on
• Hang on a mo.
• hang on by your fingertips
• hang on every word
• hang on for dear life
• hang on in there
• hang on like grim death
• hang on someone's every word
• hang onto
• hang on to for dear life
• hang on to someone for dear life
• hang on to something for dear life
• hang out shingle