Correct spelling for the English word "Loneness" is [lˈə͡ʊnnəs], [lˈəʊnnəs], [l_ˈəʊ_n_n_ə_s] (IPA phonetic alphabet).
The word "loneness" is derived from the Old English word "anan", which means "alone" or "solitude". Over time, "anan" was combined with the suffix "-ness", which was used to form abstract nouns. Thus, "loneness" came to describe the state or quality of being alone or experiencing solitude.