utapati

1. (utapati se) to drown
   Svakog leta se neko utapa u Dunavu. — Every summer someone drowns in the Danube.
2. (of grief, sorrow) to drown
   Posle razvoda je mesecima utapao tugu u alkoholu. — After the divorce he spent months drowning his sorrows in drink.
3. (utapati se u + acc.) to blend into; to merge into
   Boje zalaska se polako utapaju u more. — The colours of the sunset slowly melt into the sea.
   U velikom gradu se lako utapaš u masu. — In a big city you easily blend into the crowd.
4. (sb, sth) to drown
   Nekada su ljudi utapali neželjene mačiće u reci. — People used to drown unwanted kittens in the river.

In the senses "to drown" (intransitive) and "to blend into" the verb is reflexive — utapati se; without se it is transitive: utapati nekoga "to drown sb" and utapati tugu u alkoholu "to drown one's sorrows in drink". The perfective is utopiti (se).