gnaw

啃、咬

The puppy gnawed on an old bone all afternoon.

小狗整個下午都在啃一根舊骨頭。

侵蝕、磨損

Waves have gnawed away at the base of the cliff.

海浪不斷侵蝕著懸崖的底部。

折磨、啃噬、使苦惱

Guilt gnawed at him for weeks after the accident.

事故過後，罪惡感折磨了他好幾個星期。

啃咬、反覆咬

She gnawed at her nails while waiting for the results.

等結果的時候她一直啃指甲。