Dictionary Thesaurus Word Dynamo Quotes Reference Translator Spanish

harmful

[hahrm-fuhl]

Example Sentences

adjective

causing or capable of causing harm; injurious: a harmful idea; a harmful habit.

Origin:
before 1000; Middle English; Old English hearmful. See harm, -ful

Related forms

harm·ful·ly, adverb

harm·ful·ness, noun

qua·si-harm·ful, adjective

qua·si-harm·ful·ly, adverb

un·harm·ful, adjective

EXPAND

un·harm·ful·ly, adverb

COLLAPSE

Synonyms
hurtful, detrimental, damaging, deleterious.

Antonyms
beneficial.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source

Link To harmful

:10

:09

:08

:07

:06

:05

:04

:03

:02

:01

Harmful is always a great word to know.

So is gobo. Does it mean:

the offspring of a zebra and a donkey.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...

Example Sentences

Every week, it seems, a new study identifies potentially harmful chemicals in common items.

Although many plastics are safe to reuse, some contain components that may be harmful to humans and the environment.

Singling out meat-eating as harmful to the environment is overly simplistic.

EXPAND

Every week, it seems, a new study identifies potentially harmful chemicals in common items.

Although many plastics are safe to reuse, some contain components that may be harmful to humans and the environment.

Singling out meat-eating as harmful to the environment is overly simplistic.

Commercial oven cleaners can expose you to caustic chemicals and harmful toxins while reducing the air quality in your home.

Normally the immune system's white blood cells help protect the body from harmful substances, called antigens.

Pollution is the introduction of harmful contaminants into air, water or soil.

Fire ants are red-colored insects that sting and deliver a harmful substance, called venom, into your skin.

Solar panels harness the power of the sun to produce electricity without releasing harmful emissions into the environment.

Federal report sees more harmful climate extremes with warming.

The risks of such injuries, as well as other potentially harmful or unsafe.

All it requires is sitting in front of a computer and using a program that subtly alters harmful thought patterns.

New studiessuggest that the stress of being poor has a staggeringly harmful influence on health.

Each time you spray a standard cleaner on your counter you breathe in a fine mist of harmful chemicals.

Learn to identify small pests, and differentiate between helpful and harmful creatures.

If you've ever sweated over a single project for months on end, this video could prove harmful to your mental health.

Even discounting global warming, coal-burning plants are much more harmful than nuclear ones.

But some people think that any regulation at all could be harmful.

Could this age-old chemical be harmful for you and.

But the problem is,even people knew that these chemicals are harmful they still use it.

Some of the potentially harmful ink ends up in the body's lymph nodes, part of the immune system.

Some harmful content gets blocked, but a lot of bad stuff goes right on through.

The federal panel said evidence showed that menthol cigarettes were more harmful than nonmenthol cigarettes.

Both of these could be harmful to your chances at any future interviews.

Now the government needs to decide how to deal with the unlucky owners of harmful genes.

Critics say the practice is harmful to marine mammals.

By looking at gene activity, researchers hope to develop a quick test for diagnosing harmful radiation exposure.

But nearly all failed because of the difficulties of getting a working gene into cells without also causing harmful side effects.

State-provided housing is expensive, too temporary and can be potentially harmful to residents.

But whether exposure to electromagnetic radiation at the level released by wireless devices is harmful is open to debate.

Much of the argument turns on whether online writing should be seen as a welcome new direction or a harmful distraction.

These may well be less harmful than coffee-and will almost certainly be more useful.

Uneaten food and scraps end up at landfills, straining resources and generating harmful methane pollution.

Religious leaders should be held accountable when their irrational ideas turn harmful.

We make them for special occasions and they are as harmful as an occasional doughnut.

Likewise, there's still a lot of debate in the scientific community about whether the cell phone radiation is harmful or not.

The report said warming and its harmful consequences could be substantially blunted by prompt action.

He concluded that they were not particularly harmful.

Antibiotics may rid the colon not only of harmful bacteria, but also of the beneficial ones that normally live there.

Not surprisingly, he had little success in treating cancer by infecting patients with harmful bacteria.

Even after removal of the inserts, the boxes could have residuals that might be harmful to weakened survivors.

It is best to avoid physical contact with oxalic acid as it is a harmful substance which is corrosive.

It is offensive in itself, even without considering the harmful consequences.

Empirical research is far clearer about the harmful effects on output once inflation is in double digits.

It's possible to remove tough, greasy stains with gentle products that do not contain harmful chemical detergents.

The insula, an area of the brain largely ignored by researchers, may hold the key to breaking harmful addictions.

We've already learnt twice how harmful a war against other world power is for a country.

Water purification removes or kills harmful bacteria, amoebas, viruses and other microscopic bugs that can make you sick.

Then the coffee user may be willing to give up the harmful indulgence.

Two years later the dog has shown no harmful effects.

There are no hard data on how prevalent such substances are, or how harmful.

Organic skin care is increasing in popularity due to concern about potentially harmful ingredients in commercial beauty products.

What's harmful for us may not be harmful for the greater ocean.

It's gravitating toward self-cleaning equipment that wipes sweat away and keeps people protected from harmful bacteria.

Every day, a bat eats much of its body weight in insects, many of them harmful to crops.

I'd rather have my created family than a blood-related family that's harmful.

Repeated ructions at the top are harmful for any firm.

Strong, lightweight materials made from nanotubes could protect aircraft and satellites from harmful electromagnetic interference.

They produce low levels of toxin, so they're not harmful.

After they are cut, the vegetables are washed in a chlorine solution to kill harmful bacteria and rinsed in plain water.

Both these extremes can be harmful to the new faculty member.

Bags that wind up at sea can absorb toxic chemicals, making them even more harmful to the wildlife around them.

Chemicals such as chlorine may be added to kill harmful bacteria, and fluoride might be added to reduce tooth decay in children.

Evolutionary medicine has long served to explain how some genes can be harmful in one context but beneficial in another.

And it is itself a painful, potentially harmful condition of confinement.

It would be useless and possibly harmful information.

It is clear, nonetheless, that certain kinds of austerity are less harmful to growth.

Wood smoke can worsen asthma, and is especially harmful to children and older people.

And a harmful photo app could snap photos with a user's camera even when the user is not pressing the shutter button.

They do their part in educating students and helping them reduce their possibly harmful footprint.

And several features of this recession look especially harmful.

The challenge remains to find ever more efficient and less environmentally harmful ways to feed the world.

The sting is usually no more harmful than an insect bite, but reaction to the toxin can vary greatly.

It's responsible for the color of skin and protects humans from harmful solar radiation.

Both drilling your child and using video as a babysitter are harmful.

But because culture changes faster than our genes, such modules may now be harmful.

Driving fuel-guzzling vehicles increases harmful emissions and the demand for energy.

Of course, this study does not settle the question of how potentially harmful a new mercury filling is.

In addition to averting the harmful effects of antibiotic overuse on human.

Thompson insists that they don't work and have harmful side effects.

What the study does do, though, is add to the evidence that dieting is harmful.

The farms in the area use some highly toxic pesticides and other harmful chemicals.

It is harmful to some plants and not proven harmful to anything else.

In the long run, that is harmful to consumers and the nation.

In my experience, such hires have inevitably been harmful in the long run.

Drugs are controlled because they are harmful, they are not harmful because they are controlled.

He hopes the new tags will be less harmful to the birds.

Religion is an anachronistic waste of time that these days is way more harmful than helpful.

It is already clear that some manufactured nanoparticles are harmful to mice and fish.

But such microbes serve as warning signs that harmful fecal.

It is producing people who are completey dependent on technology and its idiotic harmful products.

Experiments that add iron to the sea have had mixed success, though, and may cause harmful algal blooms and ocean acidification.

But the animals are highly endangered due to human threats such as poaching, beach development, and harmful fishing practices.

Company officials say the level of radioactivity that was released is small and not harmful.

The toxins can be particularly harmful for people with weakened immune systems.

Change is clearly needed, because government procurement practices have turned out to be harmful.

Some fish may contain harmful chemicals, which can be the result of both natural causes and water pollution.

The other half involves scrapping environmentally harmful subsidies.

Combustion may reduce the toxicity of some waste as the high temperatures can break down harmful chemical compounds.

Most of these approaches have been dismissed as too expensive to install or because biocides could be harmful to the environment.

Most of this trash washed into the river from the streets carrying with it many harmful chemicals.

Instead, it lets the plover eat small, harmful animals attached to the crocodile's teeth.

Worse yet, burning oil puts harmful gases into the air.

COLLAPSE

Collins

World English Dictionary

harmful (ˈhɑːmfʊl)

—*adj*
	causing or tending to cause harm; injurious

'harmfully

—*adv*

'harmfulness

—n

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

Word Dynamo By Dictionary.com

Searching for harmful?
How many words do you actually know?

FIND OUT

acid rain affected baleful baneful bioclean bioterrorism

Matching Quote

"In my opinion it is harmful to place important things in the hands of philanthropy, which in Russia is marked by a chance character. Nor should important matters depend on leftovers, which are never there. I would prefer that the government treasury take care of it."

-Anton Pavlovich Chekhov

Partners:Word Bloglines Citysearch The Daily Beast Ask Answers Ask Kids Life123 Sendori Thesaurus

About Privacy Policy Terms of Use API Careers Advertise with Us Contact Us Help