IPA: /ˈsmʌɡlə/
KK: /ˈsmʌɡlər/
A person who secretly brings goods into or out of a country to avoid paying taxes or to break the law.
The smuggler was caught trying to bring illegal drugs across the border.
Smuggler → It is formed from "smuggle" (originating from the late 17th century, possibly from the dialectal English 'smug' meaning to move secretly) and the suffix "-er" (meaning a person who). A smuggler is a person who moves goods secretly, often to avoid legal restrictions.
Think of someone who is 'moving secretly' — that's what a smuggler does, and the '-er' just means a person.