Correct spelling for the English word "Atwixt" is [ˈatwɪkst], [ˈatwɪkst], [ˈa_t_w_ɪ_k_s_t] (IPA phonetic alphabet).
The word "atwixt" is an archaic adverb derived from Middle English. It is a contraction of "atwix", which means "between" or "betwixt".
"Atwixt" comes from the Old English word "betwix", which is a combination of "be" (meaning "by" or "between") and "twix" (meaning "two"). The meaning of "betwix" evolved to signify something being "between two things" or "in the middle", and eventually, "atwixt" emerged as a contracted form.
Over time, "atwixt" became less common and has largely fallen out of use in contemporary English. However, its etymology can still be traced back to the Old English roots that describe a location or state of being between two things.