Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
bereaved [bɪˈriːvd] adj понёсший тяжёлую утра́ту
n
the bereaved друзья́ mpl и ро́дственники mpl поко́йного
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.