-crum

Etymology
From by long distance dissimilation of /l..l/ > /l...r/. Ultimately from. Although the Proto-Indo-European suffix had a variant with *r (, the ancestor of Latin ), the /k/ in -crum indicates that it comes from *tlom, since Proto-Indo-European *t was regularly changed to *k in Italic before *l, but not before *r. Based on the form of Umbrian ehvelklu 'decretum', the dissimilation to /r/ that created the form -crum postdates Proto-Italic. Compare, a dissimilated allomorph of.