Correct spelling for the English word "tidel" is [tˈɪdə͡l], [tˈɪdəl], [t_ˈɪ_d_əl] (IPA phonetic alphabet).
There doesn't seem to be a word "tidel" in the English language. Perhaps you meant "tidal?" If so, the etymology of the word "tidal" is derived from the Middle English word "tide", meaning "time" or "season". The word "tide" itself comes from the Old English word "tid", also meaning "time" or "period". The term "tidal" refers to something related to or influenced by tides, particularly the regular rise and fall of the sea that occurs twice each day.