Russian

Prefix

у- • ‎(u-)

1. away

   идти́‎ ― idtí ― to go

   уйти́‎ ― ujtí ― to go away, to leave

2. with a more concrete purpose

   говори́ть‎ ― govorítʹ ― to say

   уговори́ть‎ ― ugovorítʹ ― to persuade