to cut weeds and eliminate the roots (idiom); to destroy root and branch
to eliminate completely
Definitions (粵典–words.hk)
動詞
處理問題嘅時候,將問題嘅根源都解決埋 to eliminate the root of the problem; to stamp out the source of the trouble; literally '(when) cutting weeds, remove the roots'
Definitions (Wiktionary)
phrase, idiomatic
to root out; to nip in the bud; to eliminate completely