indignant

 
Pronunciation: /ɪnˈdɪgnənt/

adjective

  • feeling or showing anger or annoyance at what is perceived as unfair treatment: he was indignant at being the object of suspicion

Derivatives

indignantly

adverb

Origin:

late 16th century: from Latin indignant- 'regarding as unworthy', from the verb indignari, from in- 'not' + dignus 'worthy'