Proto-Yenisseian: *ʔīs-
Meaning: to swear, curse
Ket: di:śǝ4 (North.); South. diś4
Yug: d́ɨ:hs / d́i:hs
Comments: ССЕ 195. Pump. (Срсл.) biś "curse" is probably a Yug form; this allows us to regard d- and b- as prefixed elements (quite common in Yenisseian verb) and reconstruct *ʔīs-. Werner (1, 191) prefers to regard biś as a writing error instead of *diś [I would add - a rather bizarre writing error, never encountered elsewhere] and to reconstruct <*d'ɨʔǝsǝ>.
