Correct spelling for the English word "hast coition" is [hˈe͡ɪst kˈɔ͡ɪʃən], [hˈeɪst kˈɔɪʃən], [h_ˈeɪ_s_t k_ˈɔɪ_ʃ_ə_n] (IPA phonetic alphabet).
The term "hast coition" is not commonly used in contemporary English and does not have a well-established etymology. It appears to be a phrase that combines the Old English word "hast" (meaning "hurry" or "quick") and "coition", which refers to sexual intercourse. However, it is important to note that this phrase is not widely recognized or found in most dictionaries or linguistic resources. It might have been derived from a relatively obscure or specialized context.