贻害无穷貽害無窮

yí hài wú qióng

Meaning

to have disastrous consequences

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Characters

贻yíto hand down, to give to, to bequeath贝台害hàito injure, to harm; to destroy, to kill宀丰口无wúno, not; lacking, -less一尢穷qióngpoor, destitute; to exhaust穴力