Etymology
From Middle English isykle, isikel, from Old English *īsġicel, from Proto-West Germanic *īsajikil, *īsajekul, equivalent to ice + ickle. It was assimilated to nouns in -icle, from Latin -iculus—the expected spelling would have -ickle. Cognate with Saterland Frisian Iesjuukel (“icicle”), German Low German Iesjökel, dialectal Danish jisegel (“icicle”), Norwegian isjukel (“icicle”) and Elfdalian aisikkel.