heavy-duty

Từ điển Oxford Advanced Learner 8th

ˌheavy-ˈduty [heavy-duty] BrE NAmE adjective only before noun
1. not easily damaged and therefore suitable for hard physical work or to be used all the time
•a heavy-duty carpet
2. (informal, especially NAmE)very serious or great in quantity
•I think you need some heavy-duty advice.