to work hard.

You're going to have to knuckle down to improve your grades if you want to get into a good college.

Volunteers really knuckled down and cleaned up the town after the storm.

• each their own
• each to her own
• each to hisown
• each to own
• eagle-eyed
• early bird catches the worm.
• early on
• earn brownie points
• earn spurs
• earn stripes
• earn your spurs
• earn your stripes
• ears are flapping
• ears must be burning
• earth moved
• earth-shattering
• easier said than done
• easy as A, B, C
• easy as falling off a log
• easy as pie
• easy come, easy go
• Easy does it!
• easy does it
• easy money
• eat alive