Comments:ССЕ 251-252. The forms listed above are hard to separate (although the vocalism is not quite clear). Werner (1, 332, 348) tries to make the picture clearer by reconstructing *phu 'heart' and *phǝj 'belly' respectively - but the relationship between Ket hū and Kott. fa is still unexplained. It still seems to me that we are dealing with a single root separated into later variants through old Ablaut.