The name Iška developed from the denominal adjective *Ižьska(ja) (voda) 'Ig (Creek)', derived from the toponym Ig, which was a regional name during the Middle Ages. The etymology of the name Ig is uncertain. It may be connected with the Slovene common noun igo 'yoke' (referring to the course of the river) or to the Slovene common noun iva 'goat willow' (through borrowing into and then from German), or it may derive from a pre-Slavic substratum.[5]
History
The part of the river between Iška Vas and Strahomer disappeared underground during the 2010 Slovenia floods, on the night of 20 September 2010.[6]
^Snoj, Marko (2009). Etimološki slovar slovenskih zemljepisnih imen. Ljubljana: Modrijan. pp. 167–168.
^"Izginila je reka Iška" [Iška River Disappears] (in Slovenian). Siol Slovenija. 23 September 2010. Archived from the original on 26 December 2010. Retrieved 5 February 2011.