Correct spelling for the English word "nearliest" is [nˈi͡əliəst], [nˈiəliəst], [n_ˈiə_l_i__ə_s_t] (IPA phonetic alphabet).
The word nearliest is formed by combining the adjective near with the superlative suffix -est. The adjective near originated from the Old English word neah, meaning close, nearer, which is akin to the Old High German word nah, also meaning near. Over time, through linguistic changes and influences, the word evolved into near in Modern English. The addition of the suffix -est creates a superlative form of the adjective, indicating the highest degree of nearness. However, it's important to note that nearliest is not a common word in contemporary usage, and the more commonly used superlative form of near is nearest.