heav·y-du·ty

[hev-ee-doo-tee, -dyoo-]
adjective
1.
providing an unusual amount of power, durability, etc.: heavy-duty machinery; heavy-duty shoes.
2.
very important, impressive, or serious: heavy-duty involvement; heavy-duty questions.

Origin:
1910–15

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To heavy-duty
Collins
World English Dictionary
heavy-duty
 
n
1.  made to withstand hard wear, bad weather, etc: heavy-duty uniforms
2.  subject to high import or export taxes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Heavy-duty is always a great word to know.
So is zedonk. Does it mean:
a chattering or flighty, light-headed person.
the offspring of a zebra and a donkey.
Example sentences
Lift meat from grill and wrap each piece in a double layer of heavy-duty foil,
  sealing tightly.
Follow the label's directions for heavy-duty cleaning, or use about half a cup
  of detergent for each gallon of water.
Transfer chocolate to a small heavy-duty sealable plastic bag.
Meanwhile, heavy-duty mountaineering boots are appropriate for those climbing a
  mountain.
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