different between unpredictable vs irrepressible

English

un- +? predictable

unpredictable (comparative more unpredictable, superlative most unpredictable)

unpredictable (plural unpredictables)

ir- +? repressible

irrepressible (not generally comparable, comparative more irrepressible, superlative most irrepressible)

Not containable or controllable.
- 1858, Charles Dickens, Nicholas Nickleby, ch. 15:
  [...] here the two friends burst into a variety of giggles, and glanced from time to time, over the tops of their pocket-handkerchiefs, at Nicholas, who from a state of unmixed astonishment, gradually fell into one of irrepressible laughter [...]
(of a person) Especially high-spirited, outspoken, or insistent.
- 1875, Wilkie Collins, The Law and the Lady, ch. 3:
  The irrepressible landlady gave the freest expression to her feelings.
- 1901, Frank Norris, The Octopus, Book II, Conclusion:
  "The irrepressible Yank is knocking at the doors of their temples and he will want to sell 'em carpet-sweepers for their harems."
- 1963 July 12, "People," Time:
  It was Paris' irrepressible High Fashion Doyenne Gabrielle ("Coco") Chanel, 80, so-soing this and high-hatting that, while Women's Wear Daily took notes.
- 2012 July 24, Mel Watkins, "Sherman Hemsley, ‘Jeffersons’ Star, Is Dead at 74," New York Times (retrieved 16 June 2013):
  High-strung and irrepressible, George Jefferson quickly became one of America’s most popular television characters, a high-energy, combative black man who backed down to no one.

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