Which word characterizes someone who is disposed to seeking revenge?

The term that best describes someone who is disposed to seeking revenge is "vindictive." This word is derived from a sense of desire to retaliate or harm someone in response to real or perceived wrongs. A vindictive person typically harbors feelings of resentment and engages in behavior aimed at getting back at those they feel have wronged them.

In contrast, the other options describe traits associated with kindness, understanding, and the ability to move past grievances. "Forgiving" signifies the ability to let go of anger or resentment, often overlooking the wrong done by others. "Compassionate" refers to an innate concern for the suffering of others, while "sympathetic" denotes a shared feeling of sorrow or understanding toward someone else's situation. All of these describe a disposition toward empathy and kindness rather than a pursuit of revenge, making them opposite to the idea conveyed by "vindictive."