deteriorate

verb

de·​te·​ri·​o·​rate di-ˈtir-ē-ə-ˌrāt How to pronounce deteriorate (audio)
dē-
deteriorated; deteriorating

transitive verb

1
: to make inferior in quality or value : impair
Exposure to sunlight may deteriorate the paint.
2

intransitive verb

: to become impaired in quality, functioning, or condition : degenerate
allowed a tradition of academic excellence to deteriorate
his health deteriorated
deteriorative adjective

Examples of deteriorate in a Sentence

efforts to save a deteriorating rain forest Exposure to rain and sun will gradually deteriorate the paint.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Israel-Turkey relations deteriorated in 2010 after Israeli naval commandos intercepted a humanitarian flotilla attempting to breach the blockade on the Gaza Strip. Paul Iddon, Forbes.com, 14 Apr. 2025 The ministry said that due to the sweeping tariffs imposed by the U.S., as well as the U.S.-China trade war, the growth outlook for both the U.S. and China will deteriorate. Lim Hui Jie, CNBC, 14 Apr. 2025 Experts noted that the election took place in a deeply divided nation, where citizens were split on how best to confront surging crime and a deteriorating economy. Antonio Maria Delgado, Miami Herald, 14 Apr. 2025 But the financial situation at Trinity, like tens of thousands of houses of worship in the US, had deteriorated over the last few decades. Mark Dent, HubSpot, 11 Apr. 2025 See All Example Sentences for deteriorate

Word History

Etymology

Late Latin deterioratus, past participle of deteriorare, from Latin deterior worse, from de- + -ter (suffix as in Latin uter which of two) + -ior (comparative suffix) — more at whether entry 2, -er

First Known Use

1572, in the meaning defined at transitive sense 1

Time Traveler
The first known use of deteriorate was in 1572

Browse Nearby Words

Cite this Entry

“Deteriorate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/deteriorate. Accessed 19 Apr. 2025.

Kids Definition

deteriorate

verb
de·​te·​ri·​o·​rate di-ˈtir-ē-ə-ˌrāt How to pronounce deteriorate (audio)
deteriorated; deteriorating
1
: to make or become worse or of less value : degenerate
2
deterioration
-ˌtir-ē-ə-ˈrā-shən
noun
deteriorative adjective

Medical Definition

deteriorate

intransitive verb
de·​te·​ri·​o·​rate di-ˈtir-ē-ə-ˌrāt How to pronounce deteriorate (audio)
deteriorated; deteriorating
: to become impaired in quality, functioning, or condition : degenerate
her health deteriorated
deteriorating vision

More from Merriam-Webster on deteriorate

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!