Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
forget [fəˈgɛt] (pt forgot) (pp forgotten) vt забыва́ть (забы́ть*perf) (appointment) забыва́ть (забы́ть*perf) о +prp
vi забыва́ть (забы́ть*perf)
to forget o.s. забы́ться*(perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.