The meaning given on this website is correct. The noun
Iskra means spark in some south-Slavic languages (Croatian, Serbian, Bulgarian, etc.).
And no, the verb does not have the same root.
And what's more Russian, while a Slavic language, is not a South Slavic language, so many words are quite different and it's not a good idea to compare them and look for an exact same meaning.
This message was edited 6/20/2012, 12:39 PM