adjective, rottener, rottenest.
decomposing or decaying; putrid; tainted, foul, or bad-smelling.
corrupt or morally offensive.
wretchedly bad, unpleasant, or unsatisfactory; miserable: a rotten piece of work; a rotten day at the office.
contemptible; despicable: a rotten little liar; a rotten trick.
(of soil, rocks, etc.) soft, yielding, or friable as the result of decomposition.
Australian Slang. drunk.

1175–1225; Middle English roten < Old Norse rotinn, past participle of an unrecorded verb meaning “to rot”

rottenly, adverb
rottenness, noun
half-rotten, adjective
unrotten, adjective

1. fetid, rank. 2. immoral. 4. disgusting, unwholesome; treacherous.

1. sound. 2. moral.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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World English Dictionary
rotten (ˈrɒtən)
1.  affected with rot; decomposing, decaying, or putrid
2.  breaking up, esp through age or hard use; disintegrating: rotten ironwork
3.  morally despicable or corrupt
4.  untrustworthy, disloyal, or treacherous
5.  informal unpleasant, unfortunate, or nasty: rotten luck; rotten weather
6.  informal unsatisfactory or poor: rotten workmanship
7.  informal miserably unwell
8.  informal distressed, uncomfortable, and embarrassed: I felt rotten when I told him to go
9.  (of rocks, soils, etc) soft and crumbling, esp as a result of weathering
10.  slang chiefly (Austral), (NZ) intoxicated; drunk
11.  extremely; very much: men fancy her rotten
[C13: from Old Norse rottin; related to Old English rotian to rot1]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 13c., from O.N. rotinn "decayed," pp. of verb related to rotna "to decay," from P.Gmc. stem *rut- (see rot). Sense of "corrupt" is from late 14c.; weakened sense of "bad" first recorded 1881. Rotter "objectionable person" is recorded from 1894. Rotten apple is from a saying
traced back to at least 1528: "For one rotten apple lytell and lytell putrifieth an whole heape."
Online Etymology Dictionary, © 2010 Douglas Harper
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