Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
downcast [ˈdaunkɑːst] adj (person) пода́вленный*пода́влен (eyes) опу́щенный/опу́щен
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: