Correct spelling for the English word "beest" is [bˈiːst], [bˈiːst], [b_ˈiː_s_t] (IPA phonetic alphabet).
The word "beest" is derived from the Middle English word "beste" which itself comes from the Old English word "bēo" or "bēost". These Old English forms are related to the West Germanic word "beuƀô" or "biust" which means "beast" or "animal". The word "beest" has evolved over time but continues to maintain its core meaning related to animals.