/ ɪnˈdɪgnənt; NAmE / adjective
indignant (at / about sth) | indignant (that ... ) feeling or showing anger and surprise because you think that you have been treated unfairly :
an indignant letter / look
She was very indignant at the way she had been treated.
They were indignant that they hadn't been invited.
➡ note at indignant
► in·dig·nant·ly adverb :
'I'm certainly not asking him!' she retorted indignantly.
••
WORD ORIGIN
late 16th cent.: from Latin indignant- regarding as unworthy, from the verb indignari , from in- not + dignus worthy.