Etymology
From Middle English ikil, ykle, from Old English *ġicol, ġiċel (“icicle, ice”), from Proto-West Germanic *jekul, *jikil, from Proto-Germanic *jekulaz (“piece of ice”), diminutive of *jekô (“lump of ice”), from Proto-Indo-European *h₁yeg-.
Cognate with Low German Jäkel (“icicle”), Danish egel (“icicle”), Norwegian Bokmål jøkel (“glacier, icesheet”), Norwegian Nynorsk jøkul, jøkle (“glacier, icicle”), Faroese jøkul (“glacier”), Icelandic jökull (“glacier”), Swedish jökel (“glacier”) and probably Albanian akull (“ice”) (Gheg okull). Doublet of jokul.