godan verb (-su), suru verb (precursor), transitive verb
Broadly used for causing physical or abstract harm, injury, or damage. Often interchangeable with 害する, but 害す is a godan verb.
See also: 害する
その行為は彼の評判を害した。
That act damaged his reputation.
過度の飲酒は健康を害す。
Excessive drinking harms your health.
godan verb (-su), suru verb (precursor), transitive verb
Used for killing, often in a literary or formal context. Less common than 殺す in everyday speech.
毒をもって人を害す。
Kill a person with poison.
godan verb (-su), suru verb (precursor), transitive verb
Used for hindering or obstructing progress, plans, or actions. Often seen in formal or written contexts.
悪天候が工事の進行を害した。
Bad weather hindered the progress of the construction.