istovremeno

1. simultaneously; at the same time
   Ne mogu istovremeno da kuvam i pričam telefonom. — I can't cook and talk on the phone at the same time.
   Svi su istovremeno počeli da se smeju. — Everyone started laughing at the same time.
2. (of two qualities) at the same time; also
   Film je smešan, a istovremeno veoma tužan. — The film is funny and at the same time very sad.