IPA: /əˈfɛndər/
KK: /əˈfɛndər/
A person who commits a crime or breaks a law.
The judge sentenced the offender to five years in prison.
Offender → It is formed from "offend" (from Old French *ofendre*, meaning to strike against or harm) and "-er" (meaning a person who). An offender is a person who strikes against the law or causes harm.
Think of someone who 'strikes against' ('offend') the rules — the '-er' just means a person. This helps you remember that an offender is someone who breaks the law.