Russian

Prefix

вы́- • ‎(vý-) (this prefix almost invariably bears the stress in perfective verbs)

1. (used with verbs) out, out from (describing an action of moving outside from inside)

   • идти́ ‎(idtí) — to go
   • вы́йти ‎(výjti) — to go out

2. (used with verbs) completion or fulfillment

   • кури́ть ‎(kurítʹ) — to smoke
   • вы́курить ‎(výkuritʹ) — to smoke to the end

References

• Fasmer, Maks (1964–1973), “вы-”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in Russian), translated from German and supplemented by Trubačev O. N., Moscow: Progress
• Černyx, P. Ja. (1999), “вы-”, in Istoriko-etimologičeskij slovarʹ russkovo jazyka [Historical-Etymological Dictionary of the Russian Language] (in Russian), volume 2, 3rd reprint edition, Moscow: Russkij jazyk, page 173