onemogućavati

1. to make impossible; to prevent
   Gust sneg onemogućava saobraćaj na planini. — Heavy snow is making traffic in the mountains impossible.
   Buka mi onemogućava da se koncentrišem. — The noise keeps me from concentrating.
2. (of devices, features) to disable
   Ova opcija onemogućava automatsko ažuriranje. — This option disables automatic updates.

Used as onemogućavati kome što or kome da + verb; the perfective is onemogućiti.