IPA: /ɪnˈdʒʊrər/
KK: /ɪnˈdʒʊrər/
A person who causes harm or damage to someone or something.
The injurer was held responsible for the accident.
Injurer → It is formed from "injure" (from Latin "injuriare", meaning to harm or wrong) and "-er" (meaning a person who). An injurer is a person who causes harm or injury to another.
Think of someone who 'harms' ('injure') another person — the '-er' indicates that this person is the one doing the harming.