Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
drown [draun] vt топи́ть*(утопи́ть*perf) (also: drown out)(sound, voice) заглуша́ть (заглуши́ть perf)
vi тону́ть*(утону́ть*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: