除恶务尽（除惡務盡）　

◎ 除恶务尽 chú’è-wùjìn

[evil must be completely eradicated;Evils must be pulled up by the roots.One must be thorough in exterminating an evil] 驱除邪恶,务求彻底干净

唐以屡赦而成藩镇之祸,蔓草难图,除恶务尽。——《野叟曝言》七一回