omesti

1. (+ acc., a person) to disturb; to distract
   Buka s ulice me je omela dok sam učio. — The noise from the street distracted me while I was studying.
   Izvini, nisam htela da te ometem u radu. — Sorry, I didn't mean to disturb you at work.
2. (of plans, a process) to hinder; to disrupt; to thwart
   Kiša je omela održavanje koncerta. — The rain disrupted the concert.
   Policija je omela njihove planove. — The police thwarted their plans.

The activity interrupted is usually given with u + loc.: omesti nekoga u radu.