1. break new ground - to do something that is different to anything that has been done before.

It was with her ground-breaking, all-women production of Hamlet that she really established herself. (always before noun)

2. break new ground - to discover new information about a subject.

This company has produced some ground-breaking research. (always before noun)

• your salad days
• your sea legs
• your smart mouth
• yours truly
• your tail between legs
• your tail between your legs
• your two cents
• your two cents worth
• your way out of a paper bag
• your wedding tackle
• your whole world came crashing down around
• your whole world came crashing down around you
• you said it
• You scratch my back and I'll scratch yours.
• You should be so lucky!
• You've got me there.
• You've made your bed .
• You've made your bed and you'll have to lie in it.
• You wouldn't wish on my worst enemy.
• You wouldn't wish on your worst enemy.
• You wouldn't wish something on my worst enemy.
• You wouldn't wish something on your worst enemy.
• zero in
• zero in on
• zero in on something