skrnaviti

1. to desecrate; to defile
   Vandali stalno skrnave grobove na tom groblju. — Vandals keep desecrating graves in that cemetery.
   Grafiti skrnave zidove stare crkve. — Graffiti defiles the walls of the old church.
2. (of memory, a name) to defile; to sully
   Takvim izjavama skrnavite uspomenu na njega. — With statements like that you sully his memory.

The perfective is oskrnaviti.