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TOEFL IELTS BNC: 6007 COCA: 7931

decay

1 of 2

verb

de·​cay di-ˈkā How to pronounce decay (audio)
decayed; decaying; decays

intransitive verb

1
: to undergo decomposition
decaying fruit
Her teeth were decaying.
… most isotopes of copper decay quickly, but two are stable: Cu-63 and Cu-65. David E. Thomas
2
: to decline in health, strength, or vigor
Her mind is beginning to decay with age.
believes that the moral fiber of our society is decaying
3
: to fall into ruin
the city's decaying neighborhoods
4
: to decline from a sound or prosperous condition
a decaying empire
5
: to decrease usually gradually in size, quantity, activity, or force
The three voices … decayed and died out upon her ear. Thomas Hardy

transitive verb

1
: to destroy by decomposition
wood decayed by bacteria
2
obsolete : to cause to decay : impair
Infirmity, that decays the wise … William Shakespeare
decayer noun

decay

2 of 2

noun

1
a
: rot
The material is … resistant to fire, decay and termites … Jack McClintock
specifically : aerobic decomposition of proteins chiefly by bacteria
b
: the product of decay
tooth decay
2
: gradual decline in strength, soundness, or prosperity or in degree of excellence or perfection
the decay of the public school system
3
: a decline in health or vigor
mental decay
4
: a wasting or wearing away : ruin
a neighborhood that had fallen into decay
5
: decrease in quantity, activity, or force: such as
a
chemistry : spontaneous decrease in the number of radioactive atoms in radioactive material
b
physics : spontaneous disintegration (as of an atom or a particle)
6
obsolete : destruction, death
… sullen presage of your own decay. Shakespeare
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