This is terribly wrong

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  Mistwalker May 12, 2011 at 5:25pm

  熱を上げる is an expression or phrase to mean 'to become enthusiastic' so it's not wrong (if that's what you meant)...? can also mean 'have a crush on'
  netsu ga aru - 'have a temperature' if that was what you were thinking of??
  
  All the other meanings above are correct as well
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  beeant May 12, 2011 at 8:12pm

  I think in literal meaning, it can mean something like
  the temperature goes up.
  
  But as an expression, it can be like "on fire"
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  Scripteladora May 12, 2011 at 8:54pm

  I thought it meant to have fever or get higher fever
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  Gonzah May 12, 2011 at 11:50pm

  Mist where do you get all that meanings?
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  Mistwalker May 13, 2011 at 12:41am

  Berlitz Japanese Dictionary, tangerine.com, rikaichan and WWWJDIC: Online Japanese Dictionary Service. I check a few places rather than rely on one source >_> but normally start with my paperback dictionary.
  Netsu does mean fever, but in this case is an expression. right now i cant think of an example of the top of my head that applies like this - they're just annoying and you have to remember they don't match normal pattern.
  
  Ah i meant 吹く - ふく = to blow, when i said above meanings are correct.
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  beeant May 13, 2011 at 1:11am

  There are several sentence examples here:
  
  http://dictionary.goo.ne.jp/leaf/je2/58384/m0u/ねつ/
  http://ejje.weblio.jp/content/熱を上げる
  http://home.alc.co.jp/db/owa/s_kaydic?num_in=418&ctg_in=3
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  Gonzah May 13, 2011 at 11:45am

  Thanx both! =)
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  Scripteladora May 14, 2011 at 12:29am

  I would love to suggest that you put a warning when you refer to Idioms. Usually I know them ( I studied them When I was in Japan) but for whatever reason I didn't learn this one. Also Grammar sections would be useful