Adverb

indignant – feeling or showing anger because of something unjust or unworthy

I came across this word while reading “Quicksand” by Nella Larsen. It can be found in chapter 17, page 210.

“She might at least, thought Helga indignantly, have acted a little bit as if she…”

After understanding what this word means, I believe that Anne was thinking that Helga might be upset, and feeling angry on the inside. Another word she was assuming how Helga might have felted.

sources: https://www.merriam-webster.com/dictionary/indignantly