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deteriorate
de·te·ri·o·rate [ di tree ə ràyt ] (past and past participle de·te·ri·o·rat·ed, present participle de·te·ri·o·rat·ing, 3rd person present singular de·te·ri·o·rates)


transitive and intransitive verb 
Definition:
 
become or make worse: to become or make something worse in quality, value, or strength
[Late 16th century. < late Latin deteriorat-, past participle of deteriorare< Latin deterior "worse"]

de·te·ri·o·ra·tion [ di tree ə ráysh'n ] noun
de·te·ri·o·ra·tive [ di tree ə ràytiv ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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