Correct spelling for the English word "Anight" is [ˈanɪt], [ˈanɪt], [ˈa_n_ɪ_t] (IPA phonetic alphabet).
The term "anight" is not a commonly used English word, and as such, it does not have a clear etymology or historical usage. It appears to be a combination of the prefix "a-" meaning "in" or "into", and the word "night". However, without any specific context or source indicating otherwise, it is difficult to determine the exact origin and meaning of "anight" as a standalone word.