свояк

Etymology
From.

Noun

 * 1)  brother-in-law husband of wife’s sister
 * 2)  relative
 * 3)  cue ball

Noun

 * 1) wife's brother, brother-in-law
 * 2) husband of wife's sister, brother-in-law
 * 3)  male relative
 * 4)  close male friend