Correct spelling for the English word "most bluesky" is [mˈə͡ʊst blˈuːska͡ɪ], [mˈəʊst blˈuːskaɪ], [m_ˈəʊ_s_t b_l_ˈuː_s_k_aɪ] (IPA phonetic alphabet).
The phrase "most bluesky" does not have a specific etymology, as it is not a commonly used phrase or idiom. "Bluesky" is a compound word combining the adjective "blue", referring to the color associated with the sky, and "sky". However, the addition of "most" in front of "bluesky" does not follow any established etymology or linguistic pattern. It may be a creative phrase coined by an individual or a specific group for a particular purpose, which means its origins and meaning might be context-dependent.