COMMENT: Reconstructed for the PEC level. Although in PN we have a stem with changing class prefixes, it is probably secondary: a result of treating *d- in PN *dist "(lower) end" (cf. Chech., Ing. dist) as a class prefix. All other data point to a protoform with the initial cluster *ʔr-.
Cf. also Hurr. tawš-aɣlǝ 'bottom, lower part' (with t- regularly < *r-), see Diakonoff-Starostin 1986, 29.
