ˌheavy-ˈduty adjective

1. heavy-duty materials are strong and thick and not easily damaged:
heavy-duty canvas

2. heavy-duty machines or equipment are designed to be used for very hard work

3. especially American English informal very complicated, serious, or extreme:
Today, she was going to do some heavy-duty cleaning.

[TahlilGaran] Dictionary of Contemporary English ▲

strong having a lot of physical strength:
It took four strong men to lift the piano.
You open it – you’re stronger than I am.
powerful very strong – used about someone’s body, arms, muscles etc:
his big powerful shoulders
He was a tall man with a powerful physique.
muscular having big muscles and looking strong:
She liked men who were big and muscular.
He had a firm muscular body.
well-built a well-built man is strong and tall and has a big body:
Police say the man they are looking for is 36 years old, 6 feet tall, and well-built.
hunky informal strong and attractive:
She married hunky Hollywood star Brad Pitt.
He looks hunky, but he’s not really my type.
tough strong – used especially about something that can be used a lot without damaging it or making it weaker:
a pair of tough leather boots
Kitchen floors need to be tough enough to withstand heavy use.
heavy-duty [only before noun] extremely strong – used about materials, tools, machines etc that are made especially to be used a lot without being easily damaged:
heavy-duty rubber gloves
a heavy-duty carpet for the hallway
sturdy strong and often thick, and not likely to fall over or get broken:
a fence made with sturdy wooden posts
The furniture is simple but sturdy.
unbreakable extremely strong and impossible to break:
Babies need to have unbreakable dishes and cups.
indestructible impossible to break, damage, or destroy, and lasting forever:
Gold is virtually indestructible.
The pyramids were built as indestructible tombs for the Pharaohs.
hard-wearing British English, long-wearing American English used about materials and products that will remain in good condition for a long time even when they are used a lot:
Ceramic tiles are easy to keep clean and hard-wearing.
a hard-wearing fabric
durable especially written used about materials and products that will remain in good condition for a long time – often used on product labels:
The jacket has a durable nylon lining.
Varnish is more durable than paint.
robust especially written strongly made – used especially about the structure of something, for example a vehicle or machine:
a mountain bike with a robust frame
The hardware for the computer must be robust and inexpensive.

[TahlilGaran] English Thesaurus ▲

strong not easily broken or damaged:
The bags are made of strong black plastic.
We need a strong rope for this job.
tough strong – used especially about something that can be used a lot without damaging it or making it weaker:
a pair of tough leather boots
Kitchen floors need to be tough enough to withstand heavy use.
heavy-duty [only before noun] extremely strong – used about materials, tools, machines etc that are made especially to be used a lot without being easily damaged:
heavy-duty rubber gloves
a heavy-duty carpet for the hallway
sturdy strong and often thick, and not likely to fall over or get broken:
a fence made with sturdy wooden posts
The furniture is simple but sturdy.
unbreakable extremely strong and impossible to break:
Babies need to have unbreakable dishes and cups.
indestructible impossible to break, damage, or destroy, and lasting forever:
Gold is virtually indestructible.
The pyramids were built as indestructible tombs for the Pharaohs.
hard-wearing British English, long-wearing American English used about materials and products that will remain in good condition for a long time even when they are used a lot:
Ceramic tiles are easy to keep clean and hard-wearing.
a hard-wearing fabric
durable especially written used about materials and products that will remain in good condition for a long time – often used on product labels:
The jacket has a durable nylon lining.
Varnish is more durable than paint.
robust especially written strongly made – used especially about the structure of something, for example a vehicle or machine:
a mountain bike with a robust frame
The hardware for the computer must be robust and inexpensive.

[TahlilGaran] English Thesaurus ▲

heavy-duty
[American & Australian, informal]
complicated and very serious.
Studies show that the homeless develop some heavy-duty health problems living on the streets.
(always before noun)

[TahlilGaran] English Idioms Dictionary ▲

heavy duty
adj. Made for long or hard use; very strong.
The lumberman used heavy-duty trucks for hauling logs down the mountains.
The workers in the steel mill have heavy-duty gloves for handling hot steel.
Mrs. Carlson bought a heavy-duty cleanser to clean her greasy oven.

[TahlilGaran] English Idioms Dictionary ▲