expression
all pain, no gain; doing no good and a lot of harm; having no redeeming features
Idiomatic expression meaning something brings only harm and no benefit. Often used to criticize an action or thing as completely disadvantageous.
そんな計画は百害あって一利なしだ。
That plan will do nothing but harm.
タバコは百害あって一利なしと言われる。
It is said that smoking has no benefits and only causes harm.
A four-character compound with a similar meaning (harmful and useless), but more formal and literary than 百害あって一利なし.
A set phrase composed of 百害 (a hundred harms), あって (having), 一利 (one benefit), and なし (none). The literal meaning is 'a hundred harms and not a single gain.'