The Collaborative International Dictionary of English v.0.48:

Jangle \Jan"gle\, v. i. [imp. & p. p. Jangled; p. pr. & vb. n.
   Jangling.] [OE. janglen to quarrel, OF. jangler to rail,
   quarrel; of Dutch or German origin; cf. D. jangelen, janken,
   to whimper, chide, brawl, quarrel.]
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   1. To sound harshly or discordantly, as bells out of tune.
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   2. To talk idly; to prate; to babble; to chatter; to gossip.
      "Thou janglest as a jay." --Chaucer.
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   3. To quarrel in words; to altercate; to wrangle.
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            Good wits will be jangling; but, gentles, agree.
                                                  --Shak.
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            Prussian Trenck . . . jargons and jangles in an
            unmelodious manner.                   --Carlyle.
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The Collaborative International Dictionary of English v.0.48:

Jangling \Jan"gling\, a.
   Producing discordant sounds. "A jangling noise." --Milton.
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The Collaborative International Dictionary of English v.0.48:

Jangling \Jan"gling\, n.
   1. Idle babbling; vain disputation.
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            From which some, having swerved, have turned aside
            unto vain jangling.                   --1 Tim. i. 6.
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   2. Wrangling; altercation. --Lamb.
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WordNet (r) 3.0 (2006):

jangling
    adj 1: like the discordant ringing of nonmusical metallic
           objects striking together; "cowboys with jangling spurs"
           [syn: jangling, jangly]

Moby Thesaurus II by Grady Ward, 1.0:

51 Moby Thesaurus words for "jangling":
   ajar, antagonistic, antipathetic, at cross-purposes,
   at loggerheads, at odds, at variance, at war, clashing,
   conflicting, confused, contradictory, contrary, cranky, cross,
   differing, disaccordant, disagreeable, disagreeing, discordant,
   discrepant, disharmonious, disproportionate, dissident, dissonant,
   divergent, grating, grinding, harsh, hostile, immiscible,
   inaccordant, incompatible, inharmonious, jangly, jarring, jostling,
   negative, out of accord, out of whack, rasping, raspy, repugnant,
   scraping, scrapy, scratching, scratchy, uncongenial, unharmonious,
   variant, warring