Having or showing no resentment or desire for revenge(adjective)
WordNet. Princeton University. 2010.
Use "unbitter" in a sentence
"Not at all bitter, very genuinely unbitter, just endlessly confused!!"
"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."
"And when, after 10,000 days of captivity, the gates of prison were opened, you emerged to face your nation unbitter and unbroken."