heavy-duty
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heavy–du·ty

adjective \ˈhe-vē-ˈdü-tē, -ˈdyü-\

Definition of HEAVY-DUTY

1
: able or designed to withstand unusual strain <heavy–duty trucks>
2
: intensive <heavy–duty bargaining>
3
: important, prominent <heavy–duty lawyers>

First Known Use of HEAVY-DUTY

1914

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