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Longman Dictionary of Contemporary English

導出

decay

Word family

1 [intransitiveI, transitiveT]DECAY to be slowly destroyed by a natural chemical process, or to make something do this （使）腐烂；（使）变坏

Her body was already starting to decay.

她的尸体已经开始腐烂。

Most archaeological finds are broken, damaged, or decayed.

大部分考古发现物都已破裂、损坏或腐烂。

decaying organic matter

腐烂的有机物

In everyday English, people usually say rot rather than decay when talking about food: 在日常英语中,人们谈论食物一般说 rot ,而不用 decay

There was a smell of rotting vegetables.

有股蔬菜腐烂的味道。

2 [intransitiveI]DECAY if buildings, structures, or areas decay, their condition gradually becomes worse 〔建筑、结构或地区〕破败，毁坏

Hundreds of historic buildings are being allowed to decay.

数百幢历史建筑被任由破败。

Britain’s decaying inner cities

英国破败的旧城区

3 [intransitiveI]LESS if traditional beliefs, standards etc decay, people do not believe in them or support them anymore 〔传统观念、标准等〕失去影响力，衰败，衰落 SYN decline

In Orthodox Europe, mass religion seems to have decayed less.

在正教会流行的欧洲地区，集体宗教信仰的影响力似乎衰退得没那么严重。

n THESAURUS

decay to be slowly destroyed by a natural chemical process – use this especially about natural things such as wood or plants, or about teeth

The leaves decay and enrich the soil.

He had bad breath and decaying teeth.

The fabric slowly began to decay.

rot to decay. Rot is less formal than decay and is more common in everyday English

The fruit was left to rot on the ground.

rotting teeth

Most of the wood under the paint had rotted.

the smell of rotting vegetation (=decaying leaves and plants)

go off British EnglishBrE if food goes off, it starts to smell bad and is no longer be safe to eat

I think the milk’s gone off.

The meat smells as if it's gone off.

spoil if food spoils, it starts to decay, so that it is no longer safe to eat. Spoil is more formal and is less common in everyday British English than go off

Food left in the sun will quickly start to spoil.

go mouldy British EnglishBrE, moldy American EnglishAmE to begin to have a soft green or black substance growing on the surface of the food, so that it is not good to eat anymore

Ugh, the cheese has gone mouldy!

decompose formal to decay – use this especially about dead plants or flesh

leaves decomposing on the forest floor

putrefy formal to decay and have a very bad smell – use this especially about flesh or plants

After two days, the body was already beginning to putrefy.

putrefying meat

biodegrade to decay naturally into substances that do not harm the environment – use this especially about man-made materials and chemicals

Unlike many other materials, plastic does not biodegrade.

Examples from the Corpus

decay• Freezing conditions will stop most things from decaying.• Now even elections seem to be decaying.• If you eat too many sweets, it'll make your teeth decay.• Some of the apples lying on the ground had already begun to decay.• A few species laid eggs beneath mounds of rotten vegetation that warmed as it decayed.• Bones signify the eternal being which does not decay.• There was now not the slightest doubt that Hsu was decaying and losing her structural integrity.• The decaying body of a man was found in a vacant warehouse.• It decays by a scheme that has two paths.• This decaying city was once the busiest port in the world.• However, objects decay despite our best efforts to conserve them.• the decaying moral values of American society• In a warm climate where flesh decays rapidly, there is more risk of infection from dead animals.• In one path, the 40K decays to a calcium isotope, 40Ca.• The buildings still stand, slowly decaying, without past or future, or any links with the surrounding land.

Related topics: Biology, Chemistry

decay2 noun [uncountableU]

1 DECAYthe natural chemical change that causes the slow destruction of something 腐烂，朽烂

old cars in various stages of decay

损坏程度不等的旧车

tooth decay

蛀牙

2 DESTROYthe gradual destruction of buildings, structures etc because they have not been cared for 〔疏于管理而造成建筑物等的〕破败，衰败

poverty and urban decay

贫穷和市区的破败

fall into (a state of) decay

During the war, the area fell into decay.

战争期间这个地区衰败了。

3 LESSthe gradual destruction of ideas, beliefs, social or political systems etc 〔观念、信仰、社会制度、政治制度等的〕衰退，没落

moral decay

道德的败坏

n COLLOCATIONS

verbs

cause decay

Bacteria stick to food and cause decay.

prevent decay

You can use a preservative on the wood to prevent further decay.

ADJECTIVES/NOUN + decay

tooth/dental decay

Eating too much sugar causes tooth decay.

natural decay

Everything in our environment is subject to natural decay.

phrases

the process of decay

The natural processes of decay gradually destroys archaeological sites.

a sign of decay

I couldn't see any signs of decay on the fruit.

Examples from the Corpus

decay• And it's the bodily imperfections and decay which lead us to desire a permanence of the human essence.• I have noticed decay in some of the floorboards.• Tiny organisms that live in the soil assist the process of decay.• Now, however, the great Latin cities fell prey to widespread depopulation, economic decline, and physical decay.• Without renewal, decay becomes irredeemable.• But nomatterwhat cosmetics we use, what exercises we do, the decay of our bodies moves inexorably forward.• The decay constant F includes any process that destroys c1, c2 or their correlation.• the decay of the central government in Russia• Brushing your teeth regularly helps to fight against tooth decay.• Its rough surface traps the microflora responsible for halitosis and tooth decay.• An optimistic theory of evolutionary progress was surreptitiously beginning to replace the pessimistic doctrine of universal decay.

stages of decay• The place was littered with barbed wire and rotting lumber and a dozen old boats in various stages of decay.• The organic matter in soil consists of plant and animal debris or waste in varying stages of decay.

fall into (a state of) decay• From the time of Laurence little work was carried out on the Palace and it was again allowed to fall into decay.

Origin decay1

(1400-1500) Old North French decaïr, from Late Latin decadere “to fall, sink”

de·cay1 verb →REGISTER1 →n THESAURUS1decay2 noun →n COLLOCATIONS1

LDOCE Online

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