ronge
/ʁɔ̃ʒ/ronger
1.
verbInd1stPresSing1,3
gnaw
nibble
bite (e.g., nails)
Le chien ronge un jouet en caoutchouc.
The dog is gnawing a rubber toy.
2.
verbInd1stPresSing1,3
eat away at
torment (figuratively, as with guilt or worry)
erode (figurative)
La culpabilité le ronge depuis l'accident.
Guilt has been eating away at him since the accident.
