heavy-duty

[ hev-ee-doo-tee, -dyoo- ]

/ ˈhɛv iˈdu ti, -ˈdyu- /

providing an unusual amount of power, durability, etc.: heavy-duty machinery; heavy-duty shoes.

very important, impressive, or serious: heavy-duty involvement; heavy-duty questions.

Origin of heavy-duty

First recorded in 1910–15

Increasing fuel-economy standards for heavy-duty vehicles is, too.

Obama’s Bad Salesmanship |Michael Tomasky |June 25, 2013 |DAILY BEAST
He always brought a heavy-duty hockey duffel with him to work, but he hit the gym more often and toned down.

Britney Spears and Jason Trawick: He’s Her Fiancé, Manager, and Conservator |Ramin Setoodeh |September 11, 2012 |DAILY BEAST
Two rebel commanders tell Eli Lake they could oust Assad within a month—if the U.S. supplies them with some heavy-duty weapons.

Syrian Opposition Leaders: We Need U.S. Weapons |Eli Lake |July 23, 2012 |DAILY BEAST
Cover the roasting pan with a fitted top or heavy-duty aluminum foil.

An American Prairie Feast |Sophie Menin |July 17, 2010 |DAILY BEAST

Remove the roasting pan from the heat and carefully cover it with a fitted lid or heavy-duty aluminum foil.

An American Prairie Feast |Sophie Menin |July 17, 2010 |DAILY BEAST
The first, as I remember, to break away from the slow-speed, heavy-duty type was a celebrated Italian firm.

The Submarine in War and Peace |Simon Lake
The guard was a big man, with a heavy-duty stunner resting in the crook of his elbow.

Gold in the Sky |Alan Edward Nourse
He turned away and pulled three heavy-duty paralo-ray pistols out of the cabinet.

The Revolt on Venus |Carey Rockwell
The soft breathing of the heavy-duty motor became more pronounced, more labored.

El Diablo |Brayton Norton
And no shield would stand up under that heavy-duty distorter, even if Barra could only summon a minimum of power to operate it.

The Weakling |Everett B. Cole

heavy-duty

made to withstand hard wear, bad weather, etc heavy-duty uniforms

subject to high import or export taxes