This is the 927th most frequent Indonesian word.
diungkapkan
"Diungkapkan" means "expressed" or "revealed" in English.
Here, 'diungkapkan' is used in a passive voice construction to indicate that gratitude ('rasa syukur') is being expressed.
Rasa syukur diungkapkan oleh siswa kepada gurunya.
Gratitude was expressed by the student towards their teacher.
In this sentence, 'diungkapkan' describes that thanks ('terima kasih') were expressed during the speech, again in passive voice form.
Terima kasih telah diungkapkan dalam pidato yang menyentuh hati.
Thanks were expressed in a touching speech.
Here, 'diungkapkan' implies that the truth ('kebenaran') was made or brought forth, denoting a revealing action in a passive context.