indignant
adj.adj. feeling very angry or upset because you think someone has treated you unfairly. You use this when you feel that a rule or a right has been broken.
adj. feeling or showing strong moral or social anger in response to perceived injustice or insult. Often used predicatively after linking verbs like 'feel' or 'be'.
He felt indignant when he saw the unfair price.
The local residents were indignant when the government announced plans to build a highway through their historic park.
The diplomat's response was indignant, as he viewed the accusation as a personal attack on his professional integrity and a violation of international protocol.
Borrowed from Latin indignāns, present participle of indignor (“to consider as unworthy, be angry or displeased at”), from in- (“privative”) + dignor (“to deem worthy”), from dignus (“worthy”).