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observingly
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obsessive-compulsive disorder
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obsolete
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obsolescent

ob·so·les·cent [ òbssə léss'nt ]


adjective 
Definition:
 
becoming obsolete: in the process of becoming obsolete

[Mid-18th century. < Latin obsolescent-, present participle of obsolescere "wear out" < solere "be accustomed"]

ob·so·les·cence noun
ob·so·les·cent·ly adverb
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