Etymology

From Proto-Germanic *jekulaz ‎(“icicle, ice”) (compare Old Norse jǫkull, Old Frisian itsil ‎(“spur”), Old High German ihilla), diminutive of Proto-Germanic *jekô ‎(“ice, glacier”) (compare dialectal German Jäch ‎(“hoarfrost”), Old Norse jaki ‎(“piece of ice”)), from Proto-Indo-European *yeǵ- ‎(“ice, icicle”)