Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
cushion [ˈkuʃən] n поду́шка#
vt (collision, effect) смягча́ть (смягчи́ть perf) (seat) подкла́дывать (подложи́ть perf) поду́шку под +acc
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.