Notes: Reconstructed for the PEC level. Correspondences are regular (in PL we have -a- instead of *-ä- after a hushing fricative; ä does not occur in this position).
Some languages reflect also a stem like *š_ǟr(V)-kV (probably with an old expressive diminutive): cf. God. š:irḱa 'helminth', PD *šulerk ( < *šVrk-Vl with further suffixation?) > Ak., Tsud., Ur. šulerk, Sirg. šulk, Muir. šulelk id.