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

1.
тяжелый наркотик
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.
Полиция изъяла большое количество тяжелых наркотиков во время рейда.
•
He was arrested for dealing hard drugs.
Его арестовали за торговлю тяжелыми наркотиками.