truliti

1. to rot; to decay
   Jabuke u podrumu su počele da trule. — The apples in the cellar have started to rot.
   Drvena ograda godinama truli na kiši. — The wooden fence has been rotting in the rain for years.
2. colloq. (of a person) to rot; to waste away
   Neće valjda ceo život da truli u toj kancelariji. — Surely he won't rot in that office his whole life.
   Zbog tebe sam trulio u zatvoru pet godina. — Because of you I rotted in prison for five years.

The perfective is istruliti.