verb, gnawed, gnawed or gnawn, gnaw⋅ing.| 1. | to bite or chew on, esp. persistently. |
| 2. | to wear away or remove by persistent biting or nibbling. |
| 3. | to form or make by so doing: to gnaw a hole through the wall. |
| 4. | to waste or wear away; corrode; erode. |
| 5. | to trouble or torment by constant annoyance, worry, etc.; vex; plague. |
| 6. | to bite or chew persistently: The spaniel gnawed happily on a bone. |
| 7. | to cause corrosion: The acid gnaws at the metal. |
| 8. | to cause an effect resembling corrosion: Her mistake gnawed at her conscience. |
