In 2012, she wrote letters to each member of Congress because she was “indignant.”
It was enough to get even the normally amiable Louis Armstrong indignant.
What's going on is obvious to all, but of course any mention of what is being done is met with indignant denials.
1580s, from Latin indignantem (nominative indignans) "impatient, reluctant, indignant," present participle of indignari "to be displeased at, be indignant" (see indignation). Related: Indignantly.