vindictive
1. [ adjective ] disposed to seek revenge or intended for revenge
Synonyms: vengeful revengeful
Examples:

"more vindictive than jealous love"- Shakespeare "punishments...essentially vindictive in their nature"- M.R.Cohen

Related terms: unforgiving
2. [ adjective ] showing malicious ill will and a desire to hurt; motivated by spite
Synonyms: spiteful despiteful
Examples:

"a despiteful fiend" "a truly spiteful child" "a vindictive man will look for occasions for resentment"

Related terms: malicious
Similar spelling:   vindictively
  vindicate
  vindicated
  vindication
  vindicator