1
general::
Phrase(s): gnaw (away) at someone or something
Lit. to chew at someone or something. • I hear a mouse gnawing away at the wall. • The mosquitoes are gnawing at me something awful., Phrase(s): gnaw (away) at someone
Fig. to worry someone; to create constant anxiety in someone. • The thought of catching some horrible disease gnawed away at her. • A lot of guilt gnawed at him day and night.
McGrawhill's American Idioms And Phrasal Verbs