Correct spelling for the English word "icicl" is [ˈa͡ɪsɪkə͡l], [ˈaɪsɪkəl], [ˈaɪ_s_ɪ_k_əl] (IPA phonetic alphabet).
The word "icicle" is derived from the Old English word "gicel", which itself originated from the Old Norse word "jaki". Both "gicel" and "jaki" originally referred to "ice", but later evolved specifically to denote the hanging, tapering piece of ice formed by the freezing and melting of water. Over time, the spelling of the word gradually changed, eventually becoming "icicle" as we know it today.