hard drug
US /ˌhɑːrd ˈdrʌɡ/
UK /ˌhɑːrd ˈdrʌɡ/

1.
강력 마약
an illegal drug that is addictive and seriously harmful, such as heroin or cocaine
:
•
The police seized a large quantity of hard drugs during the raid.
경찰은 급습 중에 다량의 강력 마약을 압수했다.
•
He was arrested for dealing hard drugs.
그는 강력 마약 거래 혐의로 체포되었다.