Remarkably unbitter toward her captors.    From Wordnet, Princeton University. 

Adjective : a bitter sorrow. ,a bitter chill. ,bitter hatred. ,a bitter lesson. ,bitter words.    From Dictionary.com. 

Noun : Learn to take the bitter with the sweet.    From Dictionary.com. 

Verb (used with object) : herbs employed to bitter vermouth.    From Dictionary.com. 

Adverb : a bitter cold night.    From Dictionary.com. 

Not at all bitter, very genuinely unbitter, just endlessly confused!!.    From Wordnik.com.  [“Pin your ears back you lot; the Gene Genie speaks” « POLICE INSPECTOR BLOG] Reference

And when, after 10,000 days of captivity, the gates of prison were opened, you emerged to face your nation unbitter and unbroken.    From Wordnik.com.  [Remarks By President Clinton And President Mandela A] Reference

And when she inevitably asks us to donate to her cash-strapped campaign, we can direct her to the wallets of her optimistic and unbitter unemployed supporters in rural Pennsylvania.    From Wordnik.com.  [Warring Over Small-Town Credentials - The Caucus Blog - NYTimes.com] Reference

Al Gore - Current Media - San Francisco - Television - United States NYT staff editor on losing his job: "I feel strangely unbitter about it all".    From Wordnik.com.  [Megite Technology News: What's Happening Right Now] Reference

Strawberry Harvest Lager, but its spring-time ubiquity caused me to give it multiple tries - so many I now regard it as a refreshing, unbitter antidote to my preferred pale ales.    From Wordnik.com.  [New Orleans Saints Central] Reference

She is clear but unbitter about the costs of nurturing a man's career and subordinating her own work to that and the unreasonable expectations to be mother, muse, sextoy, and an independent voice all at the same time.    From Wordnik.com.  [Epinions Recent Content for Home] Reference

I exclaimed; 'no, I didn't know it was as bad as that,' and the tears -- unselfish, unbitter tears this time -- rushed into my eyes as I remembered the sweet white face that I had seen in grandmamma's room, and the gentle voice that had tried to say something kind and loving to me.    From Wordnik.com.  [My New Home] Reference

Scent as they bloom, resulting in beautifully scented, unbitter leaves.    From Wordnik.com.  [The Globe and Mail - Home RSS feed] Reference