| EFF | a notable achievement |
|---|---|
| EFF | use of physical or mental energy |
| EFF | earnest and conscientious activity intended to do or accomplish something |
| EFF | a series of actions advancing a principle or tending toward a particular end |
| EFF | requiring great physical effort |
| EFF | the quality of requiring deliberate effort |
| EFF | not showing effort or strain |
| EFF | requiring or apparently requiring no effort |
| EFF | without effort or apparent effort |
| EFF | the quality of requiring little effort |
| EFF | audacious (even arrogant) behavior that you have no right to |
| EFF | the quality of being bright and sending out rays of light |