eat away at something

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

eat away at sth phrasal verb [ ate away at sth eaten away at sth eaten away at sth eats away at sth eating away at sth ]
to gradually damage or destroy something
Thesaurus⁺: ↑Damaging and spoiling ↑Destroying and demolishing
Main entry: eat_{phrasal verb}