kísati (solato itd.) to vinegar; to season with vinegar; to make sour, to make acid, to add a sour substance
kísati (se) (spremeniti (se) v kislino) to acidify
malo kísati to acidulate
kísati se (figurativno) to look surly, to look bitter
kísati se to become (ali turn) sour
vreme se kisa the weather is getting worse