Correct spelling for the English word "Overhighly" is [ˌə͡ʊvəhˈa͡ɪli], [ˌəʊvəhˈaɪli], [ˌəʊ_v_ə_h_ˈaɪ_l_i] (IPA phonetic alphabet).
The word "Overhighly" is not commonly found in English dictionaries, and it does not have a specific etymology. However, it is worth noting that "Over-" is a prefix derived from Old English and commonly used to indicate excessive, above, or beyond a certain point. In this case, "over-" would suggest an excessive or exaggerated degree. "Highly" is an adverb derived from "high", meaning to a great extent or to a large degree. The combination of these two elements implies that something is highly or excessively elevated or regarded.