resentment

 
Pronunciation: /rɪˈzɛntm(ə)nt/

noun

[mass noun]
  • bitter indignation at having been treated unfairly: his resentment at being demoted [count noun]: some people harbour resentments going back many years

Origin:

early 17th century: from Italian risentimento or French ressentiment, from obsolete French resentir (see resent)