estaban falleciendo
Imperfect progressiveellos/ellas/ustedesconjugation offallecer.

fallecer

Una de las razones por la que se incrementaba la escasez de clérigos era que de las dos generaciones de Oblatos que llegaron a Río Grande antes de 1880, la mayoría de ellos con una longevidad excepcional, estaban falleciendo o retirándose del ministerio.
One reason for the increasing clergy shortage was that the two generations of Oblates who had arrived along the Rio Grande before 1880, most of whom had demonstrated remarkable longevity, were finally dying or retiring from ministry.
Word of the Day
sorcerer