がい 害す Show inflections LinksSentence search for 害すSentence search for がいすKanji details for 害Edit in JMdict Godan verb with 'su' ending, Su verb - precursor to the modern suru, Transitive verb1. to injure; to damage; to harm; to hurtSee also 害するGodan verb with 'su' ending, Su verb - precursor to the modern suru, Transitive verb2. to killGodan verb with 'su' ending, Su verb - precursor to the modern suru, Transitive verb3. to hinder; to obstruct Discussions Log in to talk about this word.