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So, I was trying to think of a word that had the opposite meaning of "latent".

Latent means "existing, yet unmanifested". I'm looking for a word that meant "existing and manifested, yet dissipating throughout his life".

For example, angry behaviour could exist in someone from an early age but then disappear over a few years... what would the adjective for that behaviour be?

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Why not dissipating? –  bib Sep 4 '13 at 21:14
    
As usual with "what is the opposite" questions, an 'opposite' would not be well-defined here. Something that is 'not existing, yet manifested' has me beat. Something that is present but then disappears is (relatively) short-lived, ephemeral, temporary... –  Edwin Ashworth Sep 4 '13 at 21:42

3 Answers 3

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It sounds as if you are seeking a word you used in your question - dissipating

to disappear gradually, or to cause something to disappear gradually: It took months of effort to dissipate the oil spill in the North Sea.

There are numerous other terms for this gradual decline, such as

  • fading
  • extinguishing
  • exhausting
  • declining
  • diminishing
  • depleting
  • dispersing
  • diffusing
  • vanishing
  • dissolving
  • disappearing
  • devolving
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Thank you very much. I was looking for a word that didn't end with "ing", but it looks like there aren't any. Thanks :) –  Jordan Elliot Finch Sep 4 '13 at 23:02
    
@JordanElliotFinch All of these verbs have other forms such as faded, to extinguish, exhaust. You can use the form that suits your structure. –  bib Sep 4 '13 at 23:16

If you look at it as meaning "an existing thing that is unmanifested", then you could consider "extant" (an existing thing that is currently manifested) its antonym.

While perhaps not exactly what you aksed for, that word might in fact work in your case. It doesn't directly imply the thing has tailed off over time. However, that is the nature of things, so a hint of that implication is in there. There's nothing stopping you from helping it along a bit with other words ("still" being a good choice).

If that isn't enough for you, try "residual", which is more like "the amount that is still left after a lot has been used up". I don't think it qualifies as a proper antonym for "latent", but it may be the word you need.

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That's a nice word and it fulfils half of my need, as you say. I suppose "diminishing" would fit my needs, now that I think about it. Thanks for the help :) –  Jordan Elliot Finch Sep 4 '13 at 21:15

Waning, from wane, To decrease gradually in size, amount, intensity, or degree; decline.

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