From Old Danish getse, gitse, getsa (“to guess”), from Old Norse *getsa, *gitsa, from Proto-Germanic *gitisōną (“to guess”), from Proto-Germanic *getaną (“to get”), from Proto-Indo-European *gʰed- (“to take, seize”). Cognate with Danish gåde (“a riddle”), Swedish gissa (“to guess”), Saterland Frisian gisje (“to guess”), Dutch gissen (“to guess”), Low German gissen (“to guess”), Dutch gis (“a guess”). Related also to Icelandic giska ("to guess"; from Proto-Germanic *gitiskōną). More at guess.