to do
If you have questions about the conjugation of fierigi or Esperanto in general, you can practice and get feedback from a professional tutor.
Lin fierigas neniam esti venkita de iu en tabloteniso.
He is proud of never having been beaten in ping-pong.
Lin fierigas esti artisto.
He is proud that he is an artist.
Mi scias ke vi fierigos min.
I know you'll make me proud.