useless and harmful
A yojijukugo describing something that is not only pointless but also damaging. Often used in formal or critical contexts.
The plan was criticized as useless and harmful.
Rather than continuing a useless and harmful debate, let's think of concrete solutions.
Same meaning but with the order of characters reversed; less common than 無益有害.
A proverb meaning 'all harm and no benefit'; similar in meaning but more emphatic and colloquial.
A yojijukugo composed of 無益 (useless) and 有害 (harmful). The exact historical origin is uncertain, but it follows a common pattern of combining two two-character compounds to form a four-character idiom.